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1 /* Copyright (c) 2006-2008 Jonas Fonseca <fonseca@diku.dk>
2 *
3 * This program is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU General Public License as
5 * published by the Free Software Foundation; either version 2 of
6 * the License, or (at your option) any later version.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
14 #ifdef HAVE_CONFIG_H
15 #include "config.h"
16 #endif
18 #ifndef TIG_VERSION
19 #define TIG_VERSION "unknown-version"
20 #endif
22 #ifndef DEBUG
23 #define NDEBUG
24 #endif
26 #include <assert.h>
27 #include <errno.h>
28 #include <ctype.h>
29 #include <signal.h>
30 #include <stdarg.h>
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <sys/types.h>
35 #include <sys/wait.h>
36 #include <sys/stat.h>
37 #include <unistd.h>
38 #include <time.h>
39 #include <fcntl.h>
41 #include <regex.h>
43 #include <locale.h>
44 #include <langinfo.h>
45 #include <iconv.h>
47 /* ncurses(3): Must be defined to have extended wide-character functions. */
48 #define _XOPEN_SOURCE_EXTENDED
50 #ifdef HAVE_NCURSESW_NCURSES_H
51 #include <ncursesw/ncurses.h>
52 #else
53 #ifdef HAVE_NCURSES_NCURSES_H
54 #include <ncurses/ncurses.h>
55 #else
56 #include <ncurses.h>
57 #endif
58 #endif
60 #if __GNUC__ >= 3
61 #define __NORETURN __attribute__((__noreturn__))
62 #else
63 #define __NORETURN
64 #endif
66 static void __NORETURN die(const char *err, ...);
67 static void warn(const char *msg, ...);
68 static void report(const char *msg, ...);
69 static void set_nonblocking_input(bool loading);
70 static size_t utf8_length(const char *string, int *width, size_t max_width, int *trimmed, bool reserve);
71 static bool prompt_yesno(const char *prompt);
72 static int load_refs(void);
74 #define ABS(x) ((x) >= 0 ? (x) : -(x))
75 #define MIN(x, y) ((x) < (y) ? (x) : (y))
77 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
78 #define STRING_SIZE(x) (sizeof(x) - 1)
80 #define SIZEOF_STR 1024 /* Default string size. */
81 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
82 #define SIZEOF_REV 41 /* Holds a SHA-1 and an ending NUL. */
83 #define SIZEOF_ARG 32 /* Default argument array size. */
85 /* Revision graph */
87 #define REVGRAPH_INIT 'I'
88 #define REVGRAPH_MERGE 'M'
89 #define REVGRAPH_BRANCH '+'
90 #define REVGRAPH_COMMIT '*'
91 #define REVGRAPH_BOUND '^'
93 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
95 /* This color name can be used to refer to the default term colors. */
96 #define COLOR_DEFAULT (-1)
98 #define ICONV_NONE ((iconv_t) -1)
99 #ifndef ICONV_CONST
100 #define ICONV_CONST /* nothing */
101 #endif
103 /* The format and size of the date column in the main view. */
104 #define DATE_FORMAT "%Y-%m-%d %H:%M"
105 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
107 #define AUTHOR_COLS 20
108 #define ID_COLS 8
110 /* The default interval between line numbers. */
111 #define NUMBER_INTERVAL 5
113 #define TAB_SIZE 8
115 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
117 #define NULL_ID "0000000000000000000000000000000000000000"
119 #ifndef GIT_CONFIG
120 #define GIT_CONFIG "config"
121 #endif
123 /* Some ascii-shorthands fitted into the ncurses namespace. */
124 #define KEY_TAB '\t'
125 #define KEY_RETURN '\r'
126 #define KEY_ESC 27
129 struct ref {
130 char *name; /* Ref name; tag or head names are shortened. */
131 char id[SIZEOF_REV]; /* Commit SHA1 ID */
132 unsigned int head:1; /* Is it the current HEAD? */
133 unsigned int tag:1; /* Is it a tag? */
134 unsigned int ltag:1; /* If so, is the tag local? */
135 unsigned int remote:1; /* Is it a remote ref? */
136 unsigned int tracked:1; /* Is it the remote for the current HEAD? */
137 unsigned int next:1; /* For ref lists: are there more refs? */
138 };
140 static struct ref **get_refs(const char *id);
142 enum format_flags {
143 FORMAT_ALL, /* Perform replacement in all arguments. */
144 FORMAT_DASH, /* Perform replacement up until "--". */
145 FORMAT_NONE /* No replacement should be performed. */
146 };
148 static bool format_argv(const char *dst[], const char *src[], enum format_flags flags);
150 struct int_map {
151 const char *name;
152 int namelen;
153 int value;
154 };
156 static int
157 set_from_int_map(struct int_map *map, size_t map_size,
158 int *value, const char *name, int namelen)
159 {
161 int i;
163 for (i = 0; i < map_size; i++)
164 if (namelen == map[i].namelen &&
165 !strncasecmp(name, map[i].name, namelen)) {
166 *value = map[i].value;
167 return OK;
168 }
170 return ERR;
171 }
174 /*
175 * String helpers
176 */
178 static inline void
179 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
180 {
181 if (srclen > dstlen - 1)
182 srclen = dstlen - 1;
184 strncpy(dst, src, srclen);
185 dst[srclen] = 0;
186 }
188 /* Shorthands for safely copying into a fixed buffer. */
190 #define string_copy(dst, src) \
191 string_ncopy_do(dst, sizeof(dst), src, sizeof(src))
193 #define string_ncopy(dst, src, srclen) \
194 string_ncopy_do(dst, sizeof(dst), src, srclen)
196 #define string_copy_rev(dst, src) \
197 string_ncopy_do(dst, SIZEOF_REV, src, SIZEOF_REV - 1)
199 #define string_add(dst, from, src) \
200 string_ncopy_do(dst + (from), sizeof(dst) - (from), src, sizeof(src))
202 static char *
203 chomp_string(char *name)
204 {
205 int namelen;
207 while (isspace(*name))
208 name++;
210 namelen = strlen(name) - 1;
211 while (namelen > 0 && isspace(name[namelen]))
212 name[namelen--] = 0;
214 return name;
215 }
217 static bool
218 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
219 {
220 va_list args;
221 size_t pos = bufpos ? *bufpos : 0;
223 va_start(args, fmt);
224 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
225 va_end(args);
227 if (bufpos)
228 *bufpos = pos;
230 return pos >= bufsize ? FALSE : TRUE;
231 }
233 #define string_format(buf, fmt, args...) \
234 string_nformat(buf, sizeof(buf), NULL, fmt, args)
236 #define string_format_from(buf, from, fmt, args...) \
237 string_nformat(buf, sizeof(buf), from, fmt, args)
239 static int
240 string_enum_compare(const char *str1, const char *str2, int len)
241 {
242 size_t i;
244 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
246 /* Diff-Header == DIFF_HEADER */
247 for (i = 0; i < len; i++) {
248 if (toupper(str1[i]) == toupper(str2[i]))
249 continue;
251 if (string_enum_sep(str1[i]) &&
252 string_enum_sep(str2[i]))
253 continue;
255 return str1[i] - str2[i];
256 }
258 return 0;
259 }
261 #define prefixcmp(str1, str2) \
262 strncmp(str1, str2, STRING_SIZE(str2))
264 static inline int
265 suffixcmp(const char *str, int slen, const char *suffix)
266 {
267 size_t len = slen >= 0 ? slen : strlen(str);
268 size_t suffixlen = strlen(suffix);
270 return suffixlen < len ? strcmp(str + len - suffixlen, suffix) : -1;
271 }
274 static bool
275 argv_from_string(const char *argv[SIZEOF_ARG], int *argc, char *cmd)
276 {
277 int valuelen;
279 while (*cmd && *argc < SIZEOF_ARG && (valuelen = strcspn(cmd, " \t"))) {
280 bool advance = cmd[valuelen] != 0;
282 cmd[valuelen] = 0;
283 argv[(*argc)++] = chomp_string(cmd);
284 cmd += valuelen + advance;
285 }
287 if (*argc < SIZEOF_ARG)
288 argv[*argc] = NULL;
289 return *argc < SIZEOF_ARG;
290 }
292 static void
293 argv_from_env(const char **argv, const char *name)
294 {
295 char *env = argv ? getenv(name) : NULL;
296 int argc = 0;
298 if (env && *env)
299 env = strdup(env);
300 if (env && !argv_from_string(argv, &argc, env))
301 die("Too many arguments in the `%s` environment variable", name);
302 }
305 /*
306 * Executing external commands.
307 */
309 enum io_type {
310 IO_FD, /* File descriptor based IO. */
311 IO_BG, /* Execute command in the background. */
312 IO_FG, /* Execute command with same std{in,out,err}. */
313 IO_RD, /* Read only fork+exec IO. */
314 IO_WR, /* Write only fork+exec IO. */
315 };
317 struct io {
318 enum io_type type; /* The requested type of pipe. */
319 const char *dir; /* Directory from which to execute. */
320 pid_t pid; /* Pipe for reading or writing. */
321 int pipe; /* Pipe end for reading or writing. */
322 int error; /* Error status. */
323 const char *argv[SIZEOF_ARG]; /* Shell command arguments. */
324 char *buf; /* Read buffer. */
325 size_t bufalloc; /* Allocated buffer size. */
326 size_t bufsize; /* Buffer content size. */
327 char *bufpos; /* Current buffer position. */
328 unsigned int eof:1; /* Has end of file been reached. */
329 };
331 static void
332 reset_io(struct io *io)
333 {
334 io->pipe = -1;
335 io->pid = 0;
336 io->buf = io->bufpos = NULL;
337 io->bufalloc = io->bufsize = 0;
338 io->error = 0;
339 io->eof = 0;
340 }
342 static void
343 init_io(struct io *io, const char *dir, enum io_type type)
344 {
345 reset_io(io);
346 io->type = type;
347 io->dir = dir;
348 }
350 static bool
351 init_io_rd(struct io *io, const char *argv[], const char *dir,
352 enum format_flags flags)
353 {
354 init_io(io, dir, IO_RD);
355 return format_argv(io->argv, argv, flags);
356 }
358 static bool
359 io_open(struct io *io, const char *name)
360 {
361 init_io(io, NULL, IO_FD);
362 io->pipe = *name ? open(name, O_RDONLY) : STDIN_FILENO;
363 return io->pipe != -1;
364 }
366 static bool
367 kill_io(struct io *io)
368 {
369 return kill(io->pid, SIGKILL) != -1;
370 }
372 static bool
373 done_io(struct io *io)
374 {
375 pid_t pid = io->pid;
377 if (io->pipe != -1)
378 close(io->pipe);
379 free(io->buf);
380 reset_io(io);
382 while (pid > 0) {
383 int status;
384 pid_t waiting = waitpid(pid, &status, 0);
386 if (waiting < 0) {
387 if (errno == EINTR)
388 continue;
389 report("waitpid failed (%s)", strerror(errno));
390 return FALSE;
391 }
393 return waiting == pid &&
394 !WIFSIGNALED(status) &&
395 WIFEXITED(status) &&
396 !WEXITSTATUS(status);
397 }
399 return TRUE;
400 }
402 static bool
403 start_io(struct io *io)
404 {
405 int pipefds[2] = { -1, -1 };
407 if (io->type == IO_FD)
408 return TRUE;
410 if ((io->type == IO_RD || io->type == IO_WR) &&
411 pipe(pipefds) < 0)
412 return FALSE;
414 if ((io->pid = fork())) {
415 if (pipefds[!(io->type == IO_WR)] != -1)
416 close(pipefds[!(io->type == IO_WR)]);
417 if (io->pid != -1) {
418 io->pipe = pipefds[!!(io->type == IO_WR)];
419 return TRUE;
420 }
422 } else {
423 if (io->type != IO_FG) {
424 int devnull = open("/dev/null", O_RDWR);
425 int readfd = io->type == IO_WR ? pipefds[0] : devnull;
426 int writefd = io->type == IO_RD ? pipefds[1] : devnull;
428 dup2(readfd, STDIN_FILENO);
429 dup2(writefd, STDOUT_FILENO);
430 dup2(devnull, STDERR_FILENO);
432 close(devnull);
433 if (pipefds[0] != -1)
434 close(pipefds[0]);
435 if (pipefds[1] != -1)
436 close(pipefds[1]);
437 }
439 if (io->dir && *io->dir && chdir(io->dir) == -1)
440 die("Failed to change directory: %s", strerror(errno));
442 execvp(io->argv[0], (char *const*) io->argv);
443 die("Failed to execute program: %s", strerror(errno));
444 }
446 if (pipefds[!!(io->type == IO_WR)] != -1)
447 close(pipefds[!!(io->type == IO_WR)]);
448 return FALSE;
449 }
451 static bool
452 run_io(struct io *io, const char **argv, const char *dir, enum io_type type)
453 {
454 init_io(io, dir, type);
455 if (!format_argv(io->argv, argv, FORMAT_NONE))
456 return FALSE;
457 return start_io(io);
458 }
460 static int
461 run_io_do(struct io *io)
462 {
463 return start_io(io) && done_io(io);
464 }
466 static int
467 run_io_bg(const char **argv)
468 {
469 struct io io = {};
471 init_io(&io, NULL, IO_BG);
472 if (!format_argv(io.argv, argv, FORMAT_NONE))
473 return FALSE;
474 return run_io_do(&io);
475 }
477 static bool
478 run_io_fg(const char **argv, const char *dir)
479 {
480 struct io io = {};
482 init_io(&io, dir, IO_FG);
483 if (!format_argv(io.argv, argv, FORMAT_NONE))
484 return FALSE;
485 return run_io_do(&io);
486 }
488 static bool
489 run_io_rd(struct io *io, const char **argv, enum format_flags flags)
490 {
491 return init_io_rd(io, argv, NULL, flags) && start_io(io);
492 }
494 static bool
495 io_eof(struct io *io)
496 {
497 return io->eof;
498 }
500 static int
501 io_error(struct io *io)
502 {
503 return io->error;
504 }
506 static bool
507 io_strerror(struct io *io)
508 {
509 return strerror(io->error);
510 }
512 static ssize_t
513 io_read(struct io *io, void *buf, size_t bufsize)
514 {
515 do {
516 ssize_t readsize = read(io->pipe, buf, bufsize);
518 if (readsize < 0 && (errno == EAGAIN || errno == EINTR))
519 continue;
520 else if (readsize == -1)
521 io->error = errno;
522 else if (readsize == 0)
523 io->eof = 1;
524 return readsize;
525 } while (1);
526 }
528 static char *
529 io_get(struct io *io, int c, bool can_read)
530 {
531 char *eol;
532 ssize_t readsize;
534 if (!io->buf) {
535 io->buf = io->bufpos = malloc(BUFSIZ);
536 if (!io->buf)
537 return NULL;
538 io->bufalloc = BUFSIZ;
539 io->bufsize = 0;
540 }
542 while (TRUE) {
543 if (io->bufsize > 0) {
544 eol = memchr(io->bufpos, c, io->bufsize);
545 if (eol) {
546 char *line = io->bufpos;
548 *eol = 0;
549 io->bufpos = eol + 1;
550 io->bufsize -= io->bufpos - line;
551 return line;
552 }
553 }
555 if (io_eof(io)) {
556 if (io->bufsize) {
557 io->bufpos[io->bufsize] = 0;
558 io->bufsize = 0;
559 return io->bufpos;
560 }
561 return NULL;
562 }
564 if (!can_read)
565 return NULL;
567 if (io->bufsize > 0 && io->bufpos > io->buf)
568 memmove(io->buf, io->bufpos, io->bufsize);
570 io->bufpos = io->buf;
571 readsize = io_read(io, io->buf + io->bufsize, io->bufalloc - io->bufsize);
572 if (io_error(io))
573 return NULL;
574 io->bufsize += readsize;
575 }
576 }
578 static bool
579 io_write(struct io *io, const void *buf, size_t bufsize)
580 {
581 size_t written = 0;
583 while (!io_error(io) && written < bufsize) {
584 ssize_t size;
586 size = write(io->pipe, buf + written, bufsize - written);
587 if (size < 0 && (errno == EAGAIN || errno == EINTR))
588 continue;
589 else if (size == -1)
590 io->error = errno;
591 else
592 written += size;
593 }
595 return written == bufsize;
596 }
598 static bool
599 run_io_buf(const char **argv, char buf[], size_t bufsize)
600 {
601 struct io io = {};
602 bool error;
604 if (!run_io_rd(&io, argv, FORMAT_NONE))
605 return FALSE;
607 io.buf = io.bufpos = buf;
608 io.bufalloc = bufsize;
609 error = !io_get(&io, '\n', TRUE) && io_error(&io);
610 io.buf = NULL;
612 return done_io(&io) || error;
613 }
615 static int read_properties(struct io *io, const char *separators, int (*read)(char *, size_t, char *, size_t));
617 /*
618 * User requests
619 */
621 #define REQ_INFO \
622 /* XXX: Keep the view request first and in sync with views[]. */ \
623 REQ_GROUP("View switching") \
624 REQ_(VIEW_MAIN, "Show main view"), \
625 REQ_(VIEW_DIFF, "Show diff view"), \
626 REQ_(VIEW_LOG, "Show log view"), \
627 REQ_(VIEW_TREE, "Show tree view"), \
628 REQ_(VIEW_BLOB, "Show blob view"), \
629 REQ_(VIEW_BLAME, "Show blame view"), \
630 REQ_(VIEW_HELP, "Show help page"), \
631 REQ_(VIEW_PAGER, "Show pager view"), \
632 REQ_(VIEW_STATUS, "Show status view"), \
633 REQ_(VIEW_STAGE, "Show stage view"), \
634 \
635 REQ_GROUP("View manipulation") \
636 REQ_(ENTER, "Enter current line and scroll"), \
637 REQ_(NEXT, "Move to next"), \
638 REQ_(PREVIOUS, "Move to previous"), \
639 REQ_(VIEW_NEXT, "Move focus to next view"), \
640 REQ_(REFRESH, "Reload and refresh"), \
641 REQ_(MAXIMIZE, "Maximize the current view"), \
642 REQ_(VIEW_CLOSE, "Close the current view"), \
643 REQ_(QUIT, "Close all views and quit"), \
644 \
645 REQ_GROUP("View specific requests") \
646 REQ_(STATUS_UPDATE, "Update file status"), \
647 REQ_(STATUS_REVERT, "Revert file changes"), \
648 REQ_(STATUS_MERGE, "Merge file using external tool"), \
649 REQ_(STAGE_NEXT, "Find next chunk to stage"), \
650 REQ_(TREE_PARENT, "Switch to parent directory in tree view"), \
651 \
652 REQ_GROUP("Cursor navigation") \
653 REQ_(MOVE_UP, "Move cursor one line up"), \
654 REQ_(MOVE_DOWN, "Move cursor one line down"), \
655 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
656 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
657 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
658 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
659 \
660 REQ_GROUP("Scrolling") \
661 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
662 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
663 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
664 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
665 \
666 REQ_GROUP("Searching") \
667 REQ_(SEARCH, "Search the view"), \
668 REQ_(SEARCH_BACK, "Search backwards in the view"), \
669 REQ_(FIND_NEXT, "Find next search match"), \
670 REQ_(FIND_PREV, "Find previous search match"), \
671 \
672 REQ_GROUP("Option manipulation") \
673 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
674 REQ_(TOGGLE_DATE, "Toggle date display"), \
675 REQ_(TOGGLE_AUTHOR, "Toggle author display"), \
676 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization"), \
677 REQ_(TOGGLE_REFS, "Toggle reference display (tags/branches)"), \
678 \
679 REQ_GROUP("Misc") \
680 REQ_(PROMPT, "Bring up the prompt"), \
681 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
682 REQ_(SCREEN_RESIZE, "Resize the screen"), \
683 REQ_(SHOW_VERSION, "Show version information"), \
684 REQ_(STOP_LOADING, "Stop all loading views"), \
685 REQ_(EDIT, "Open in editor"), \
686 REQ_(NONE, "Do nothing")
689 /* User action requests. */
690 enum request {
691 #define REQ_GROUP(help)
692 #define REQ_(req, help) REQ_##req
694 /* Offset all requests to avoid conflicts with ncurses getch values. */
695 REQ_OFFSET = KEY_MAX + 1,
696 REQ_INFO
698 #undef REQ_GROUP
699 #undef REQ_
700 };
702 struct request_info {
703 enum request request;
704 const char *name;
705 int namelen;
706 const char *help;
707 };
709 static struct request_info req_info[] = {
710 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
711 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
712 REQ_INFO
713 #undef REQ_GROUP
714 #undef REQ_
715 };
717 static enum request
718 get_request(const char *name)
719 {
720 int namelen = strlen(name);
721 int i;
723 for (i = 0; i < ARRAY_SIZE(req_info); i++)
724 if (req_info[i].namelen == namelen &&
725 !string_enum_compare(req_info[i].name, name, namelen))
726 return req_info[i].request;
728 return REQ_NONE;
729 }
732 /*
733 * Options
734 */
736 static const char usage[] =
737 "tig " TIG_VERSION " (" __DATE__ ")\n"
738 "\n"
739 "Usage: tig [options] [revs] [--] [paths]\n"
740 " or: tig show [options] [revs] [--] [paths]\n"
741 " or: tig blame [rev] path\n"
742 " or: tig status\n"
743 " or: tig < [git command output]\n"
744 "\n"
745 "Options:\n"
746 " -v, --version Show version and exit\n"
747 " -h, --help Show help message and exit";
749 /* Option and state variables. */
750 static bool opt_date = TRUE;
751 static bool opt_author = TRUE;
752 static bool opt_line_number = FALSE;
753 static bool opt_line_graphics = TRUE;
754 static bool opt_rev_graph = FALSE;
755 static bool opt_show_refs = TRUE;
756 static int opt_num_interval = NUMBER_INTERVAL;
757 static int opt_tab_size = TAB_SIZE;
758 static int opt_author_cols = AUTHOR_COLS-1;
759 static char opt_path[SIZEOF_STR] = "";
760 static char opt_file[SIZEOF_STR] = "";
761 static char opt_ref[SIZEOF_REF] = "";
762 static char opt_head[SIZEOF_REF] = "";
763 static char opt_head_rev[SIZEOF_REV] = "";
764 static char opt_remote[SIZEOF_REF] = "";
765 static char opt_encoding[20] = "UTF-8";
766 static bool opt_utf8 = TRUE;
767 static char opt_codeset[20] = "UTF-8";
768 static iconv_t opt_iconv = ICONV_NONE;
769 static char opt_search[SIZEOF_STR] = "";
770 static char opt_cdup[SIZEOF_STR] = "";
771 static char opt_git_dir[SIZEOF_STR] = "";
772 static signed char opt_is_inside_work_tree = -1; /* set to TRUE or FALSE */
773 static char opt_editor[SIZEOF_STR] = "";
774 static FILE *opt_tty = NULL;
776 #define is_initial_commit() (!*opt_head_rev)
777 #define is_head_commit(rev) (!strcmp((rev), "HEAD") || !strcmp(opt_head_rev, (rev)))
779 static enum request
780 parse_options(int argc, const char *argv[], const char ***run_argv)
781 {
782 enum request request = REQ_VIEW_MAIN;
783 const char *subcommand;
784 bool seen_dashdash = FALSE;
785 /* XXX: This is vulnerable to the user overriding options
786 * required for the main view parser. */
787 const char *custom_argv[SIZEOF_ARG] = {
788 "git", "log", "--no-color", "--pretty=raw", "--parents",
789 "--topo-order", NULL
790 };
791 int i, j = 6;
793 if (!isatty(STDIN_FILENO))
794 return REQ_VIEW_PAGER;
796 if (argc <= 1)
797 return REQ_VIEW_MAIN;
799 subcommand = argv[1];
800 if (!strcmp(subcommand, "status") || !strcmp(subcommand, "-S")) {
801 if (!strcmp(subcommand, "-S"))
802 warn("`-S' has been deprecated; use `tig status' instead");
803 if (argc > 2)
804 warn("ignoring arguments after `%s'", subcommand);
805 return REQ_VIEW_STATUS;
807 } else if (!strcmp(subcommand, "blame")) {
808 if (argc <= 2 || argc > 4)
809 die("invalid number of options to blame\n\n%s", usage);
811 i = 2;
812 if (argc == 4) {
813 string_ncopy(opt_ref, argv[i], strlen(argv[i]));
814 i++;
815 }
817 string_ncopy(opt_file, argv[i], strlen(argv[i]));
818 return REQ_VIEW_BLAME;
820 } else if (!strcmp(subcommand, "show")) {
821 request = REQ_VIEW_DIFF;
823 } else if (!strcmp(subcommand, "log") || !strcmp(subcommand, "diff")) {
824 request = subcommand[0] == 'l' ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
825 warn("`tig %s' has been deprecated", subcommand);
827 } else {
828 subcommand = NULL;
829 }
831 if (subcommand) {
832 custom_argv[1] = subcommand;
833 j = 2;
834 }
836 for (i = 1 + !!subcommand; i < argc; i++) {
837 const char *opt = argv[i];
839 if (seen_dashdash || !strcmp(opt, "--")) {
840 seen_dashdash = TRUE;
842 } else if (!strcmp(opt, "-v") || !strcmp(opt, "--version")) {
843 printf("tig version %s\n", TIG_VERSION);
844 return REQ_NONE;
846 } else if (!strcmp(opt, "-h") || !strcmp(opt, "--help")) {
847 printf("%s\n", usage);
848 return REQ_NONE;
849 }
851 custom_argv[j++] = opt;
852 if (j >= ARRAY_SIZE(custom_argv))
853 die("command too long");
854 }
856 custom_argv[j] = NULL;
857 *run_argv = custom_argv;
859 return request;
860 }
863 /*
864 * Line-oriented content detection.
865 */
867 #define LINE_INFO \
868 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
869 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
870 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
871 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
872 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
873 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
874 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
875 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
876 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
877 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
878 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
879 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
880 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
881 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
882 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
883 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
884 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
885 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
886 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
887 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
888 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
889 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
890 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
891 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
892 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
893 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
894 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
895 LINE(ACKED, " Acked-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
896 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
897 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
898 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
899 LINE(DELIMITER, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
900 LINE(DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
901 LINE(LINE_NUMBER, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
902 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
903 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
904 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
905 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
906 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
907 LINE(MAIN_LOCAL_TAG,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
908 LINE(MAIN_REMOTE, "", COLOR_YELLOW, COLOR_DEFAULT, 0), \
909 LINE(MAIN_TRACKED, "", COLOR_YELLOW, COLOR_DEFAULT, A_BOLD), \
910 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
911 LINE(MAIN_HEAD, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
912 LINE(MAIN_REVGRAPH,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
913 LINE(TREE_DIR, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
914 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
915 LINE(STAT_HEAD, "", COLOR_YELLOW, COLOR_DEFAULT, 0), \
916 LINE(STAT_SECTION, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
917 LINE(STAT_NONE, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
918 LINE(STAT_STAGED, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
919 LINE(STAT_UNSTAGED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
920 LINE(STAT_UNTRACKED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
921 LINE(BLAME_ID, "", COLOR_MAGENTA, COLOR_DEFAULT, 0)
923 enum line_type {
924 #define LINE(type, line, fg, bg, attr) \
925 LINE_##type
926 LINE_INFO,
927 LINE_NONE
928 #undef LINE
929 };
931 struct line_info {
932 const char *name; /* Option name. */
933 int namelen; /* Size of option name. */
934 const char *line; /* The start of line to match. */
935 int linelen; /* Size of string to match. */
936 int fg, bg, attr; /* Color and text attributes for the lines. */
937 };
939 static struct line_info line_info[] = {
940 #define LINE(type, line, fg, bg, attr) \
941 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
942 LINE_INFO
943 #undef LINE
944 };
946 static enum line_type
947 get_line_type(const char *line)
948 {
949 int linelen = strlen(line);
950 enum line_type type;
952 for (type = 0; type < ARRAY_SIZE(line_info); type++)
953 /* Case insensitive search matches Signed-off-by lines better. */
954 if (linelen >= line_info[type].linelen &&
955 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
956 return type;
958 return LINE_DEFAULT;
959 }
961 static inline int
962 get_line_attr(enum line_type type)
963 {
964 assert(type < ARRAY_SIZE(line_info));
965 return COLOR_PAIR(type) | line_info[type].attr;
966 }
968 static struct line_info *
969 get_line_info(const char *name)
970 {
971 size_t namelen = strlen(name);
972 enum line_type type;
974 for (type = 0; type < ARRAY_SIZE(line_info); type++)
975 if (namelen == line_info[type].namelen &&
976 !string_enum_compare(line_info[type].name, name, namelen))
977 return &line_info[type];
979 return NULL;
980 }
982 static void
983 init_colors(void)
984 {
985 int default_bg = line_info[LINE_DEFAULT].bg;
986 int default_fg = line_info[LINE_DEFAULT].fg;
987 enum line_type type;
989 start_color();
991 if (assume_default_colors(default_fg, default_bg) == ERR) {
992 default_bg = COLOR_BLACK;
993 default_fg = COLOR_WHITE;
994 }
996 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
997 struct line_info *info = &line_info[type];
998 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
999 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
1001 init_pair(type, fg, bg);
1002 }
1003 }
1005 struct line {
1006 enum line_type type;
1008 /* State flags */
1009 unsigned int selected:1;
1010 unsigned int dirty:1;
1012 void *data; /* User data */
1013 };
1016 /*
1017 * Keys
1018 */
1020 struct keybinding {
1021 int alias;
1022 enum request request;
1023 };
1025 static struct keybinding default_keybindings[] = {
1026 /* View switching */
1027 { 'm', REQ_VIEW_MAIN },
1028 { 'd', REQ_VIEW_DIFF },
1029 { 'l', REQ_VIEW_LOG },
1030 { 't', REQ_VIEW_TREE },
1031 { 'f', REQ_VIEW_BLOB },
1032 { 'B', REQ_VIEW_BLAME },
1033 { 'p', REQ_VIEW_PAGER },
1034 { 'h', REQ_VIEW_HELP },
1035 { 'S', REQ_VIEW_STATUS },
1036 { 'c', REQ_VIEW_STAGE },
1038 /* View manipulation */
1039 { 'q', REQ_VIEW_CLOSE },
1040 { KEY_TAB, REQ_VIEW_NEXT },
1041 { KEY_RETURN, REQ_ENTER },
1042 { KEY_UP, REQ_PREVIOUS },
1043 { KEY_DOWN, REQ_NEXT },
1044 { 'R', REQ_REFRESH },
1045 { KEY_F(5), REQ_REFRESH },
1046 { 'O', REQ_MAXIMIZE },
1048 /* Cursor navigation */
1049 { 'k', REQ_MOVE_UP },
1050 { 'j', REQ_MOVE_DOWN },
1051 { KEY_HOME, REQ_MOVE_FIRST_LINE },
1052 { KEY_END, REQ_MOVE_LAST_LINE },
1053 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
1054 { ' ', REQ_MOVE_PAGE_DOWN },
1055 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
1056 { 'b', REQ_MOVE_PAGE_UP },
1057 { '-', REQ_MOVE_PAGE_UP },
1059 /* Scrolling */
1060 { KEY_IC, REQ_SCROLL_LINE_UP },
1061 { KEY_DC, REQ_SCROLL_LINE_DOWN },
1062 { 'w', REQ_SCROLL_PAGE_UP },
1063 { 's', REQ_SCROLL_PAGE_DOWN },
1065 /* Searching */
1066 { '/', REQ_SEARCH },
1067 { '?', REQ_SEARCH_BACK },
1068 { 'n', REQ_FIND_NEXT },
1069 { 'N', REQ_FIND_PREV },
1071 /* Misc */
1072 { 'Q', REQ_QUIT },
1073 { 'z', REQ_STOP_LOADING },
1074 { 'v', REQ_SHOW_VERSION },
1075 { 'r', REQ_SCREEN_REDRAW },
1076 { '.', REQ_TOGGLE_LINENO },
1077 { 'D', REQ_TOGGLE_DATE },
1078 { 'A', REQ_TOGGLE_AUTHOR },
1079 { 'g', REQ_TOGGLE_REV_GRAPH },
1080 { 'F', REQ_TOGGLE_REFS },
1081 { ':', REQ_PROMPT },
1082 { 'u', REQ_STATUS_UPDATE },
1083 { '!', REQ_STATUS_REVERT },
1084 { 'M', REQ_STATUS_MERGE },
1085 { '@', REQ_STAGE_NEXT },
1086 { ',', REQ_TREE_PARENT },
1087 { 'e', REQ_EDIT },
1089 /* Using the ncurses SIGWINCH handler. */
1090 { KEY_RESIZE, REQ_SCREEN_RESIZE },
1091 };
1093 #define KEYMAP_INFO \
1094 KEYMAP_(GENERIC), \
1095 KEYMAP_(MAIN), \
1096 KEYMAP_(DIFF), \
1097 KEYMAP_(LOG), \
1098 KEYMAP_(TREE), \
1099 KEYMAP_(BLOB), \
1100 KEYMAP_(BLAME), \
1101 KEYMAP_(PAGER), \
1102 KEYMAP_(HELP), \
1103 KEYMAP_(STATUS), \
1104 KEYMAP_(STAGE)
1106 enum keymap {
1107 #define KEYMAP_(name) KEYMAP_##name
1108 KEYMAP_INFO
1109 #undef KEYMAP_
1110 };
1112 static struct int_map keymap_table[] = {
1113 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
1114 KEYMAP_INFO
1115 #undef KEYMAP_
1116 };
1118 #define set_keymap(map, name) \
1119 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
1121 struct keybinding_table {
1122 struct keybinding *data;
1123 size_t size;
1124 };
1126 static struct keybinding_table keybindings[ARRAY_SIZE(keymap_table)];
1128 static void
1129 add_keybinding(enum keymap keymap, enum request request, int key)
1130 {
1131 struct keybinding_table *table = &keybindings[keymap];
1133 table->data = realloc(table->data, (table->size + 1) * sizeof(*table->data));
1134 if (!table->data)
1135 die("Failed to allocate keybinding");
1136 table->data[table->size].alias = key;
1137 table->data[table->size++].request = request;
1138 }
1140 /* Looks for a key binding first in the given map, then in the generic map, and
1141 * lastly in the default keybindings. */
1142 static enum request
1143 get_keybinding(enum keymap keymap, int key)
1144 {
1145 size_t i;
1147 for (i = 0; i < keybindings[keymap].size; i++)
1148 if (keybindings[keymap].data[i].alias == key)
1149 return keybindings[keymap].data[i].request;
1151 for (i = 0; i < keybindings[KEYMAP_GENERIC].size; i++)
1152 if (keybindings[KEYMAP_GENERIC].data[i].alias == key)
1153 return keybindings[KEYMAP_GENERIC].data[i].request;
1155 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
1156 if (default_keybindings[i].alias == key)
1157 return default_keybindings[i].request;
1159 return (enum request) key;
1160 }
1163 struct key {
1164 const char *name;
1165 int value;
1166 };
1168 static struct key key_table[] = {
1169 { "Enter", KEY_RETURN },
1170 { "Space", ' ' },
1171 { "Backspace", KEY_BACKSPACE },
1172 { "Tab", KEY_TAB },
1173 { "Escape", KEY_ESC },
1174 { "Left", KEY_LEFT },
1175 { "Right", KEY_RIGHT },
1176 { "Up", KEY_UP },
1177 { "Down", KEY_DOWN },
1178 { "Insert", KEY_IC },
1179 { "Delete", KEY_DC },
1180 { "Hash", '#' },
1181 { "Home", KEY_HOME },
1182 { "End", KEY_END },
1183 { "PageUp", KEY_PPAGE },
1184 { "PageDown", KEY_NPAGE },
1185 { "F1", KEY_F(1) },
1186 { "F2", KEY_F(2) },
1187 { "F3", KEY_F(3) },
1188 { "F4", KEY_F(4) },
1189 { "F5", KEY_F(5) },
1190 { "F6", KEY_F(6) },
1191 { "F7", KEY_F(7) },
1192 { "F8", KEY_F(8) },
1193 { "F9", KEY_F(9) },
1194 { "F10", KEY_F(10) },
1195 { "F11", KEY_F(11) },
1196 { "F12", KEY_F(12) },
1197 };
1199 static int
1200 get_key_value(const char *name)
1201 {
1202 int i;
1204 for (i = 0; i < ARRAY_SIZE(key_table); i++)
1205 if (!strcasecmp(key_table[i].name, name))
1206 return key_table[i].value;
1208 if (strlen(name) == 1 && isprint(*name))
1209 return (int) *name;
1211 return ERR;
1212 }
1214 static const char *
1215 get_key_name(int key_value)
1216 {
1217 static char key_char[] = "'X'";
1218 const char *seq = NULL;
1219 int key;
1221 for (key = 0; key < ARRAY_SIZE(key_table); key++)
1222 if (key_table[key].value == key_value)
1223 seq = key_table[key].name;
1225 if (seq == NULL &&
1226 key_value < 127 &&
1227 isprint(key_value)) {
1228 key_char[1] = (char) key_value;
1229 seq = key_char;
1230 }
1232 return seq ? seq : "(no key)";
1233 }
1235 static const char *
1236 get_key(enum request request)
1237 {
1238 static char buf[BUFSIZ];
1239 size_t pos = 0;
1240 char *sep = "";
1241 int i;
1243 buf[pos] = 0;
1245 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
1246 struct keybinding *keybinding = &default_keybindings[i];
1248 if (keybinding->request != request)
1249 continue;
1251 if (!string_format_from(buf, &pos, "%s%s", sep,
1252 get_key_name(keybinding->alias)))
1253 return "Too many keybindings!";
1254 sep = ", ";
1255 }
1257 return buf;
1258 }
1260 struct run_request {
1261 enum keymap keymap;
1262 int key;
1263 const char *argv[SIZEOF_ARG];
1264 };
1266 static struct run_request *run_request;
1267 static size_t run_requests;
1269 static enum request
1270 add_run_request(enum keymap keymap, int key, int argc, const char **argv)
1271 {
1272 struct run_request *req;
1274 if (argc >= ARRAY_SIZE(req->argv) - 1)
1275 return REQ_NONE;
1277 req = realloc(run_request, (run_requests + 1) * sizeof(*run_request));
1278 if (!req)
1279 return REQ_NONE;
1281 run_request = req;
1282 req = &run_request[run_requests];
1283 req->keymap = keymap;
1284 req->key = key;
1285 req->argv[0] = NULL;
1287 if (!format_argv(req->argv, argv, FORMAT_NONE))
1288 return REQ_NONE;
1290 return REQ_NONE + ++run_requests;
1291 }
1293 static struct run_request *
1294 get_run_request(enum request request)
1295 {
1296 if (request <= REQ_NONE)
1297 return NULL;
1298 return &run_request[request - REQ_NONE - 1];
1299 }
1301 static void
1302 add_builtin_run_requests(void)
1303 {
1304 const char *cherry_pick[] = { "git", "cherry-pick", "%(commit)", NULL };
1305 const char *gc[] = { "git", "gc", NULL };
1306 struct {
1307 enum keymap keymap;
1308 int key;
1309 int argc;
1310 const char **argv;
1311 } reqs[] = {
1312 { KEYMAP_MAIN, 'C', ARRAY_SIZE(cherry_pick) - 1, cherry_pick },
1313 { KEYMAP_GENERIC, 'G', ARRAY_SIZE(gc) - 1, gc },
1314 };
1315 int i;
1317 for (i = 0; i < ARRAY_SIZE(reqs); i++) {
1318 enum request req;
1320 req = add_run_request(reqs[i].keymap, reqs[i].key, reqs[i].argc, reqs[i].argv);
1321 if (req != REQ_NONE)
1322 add_keybinding(reqs[i].keymap, req, reqs[i].key);
1323 }
1324 }
1326 /*
1327 * User config file handling.
1328 */
1330 static struct int_map color_map[] = {
1331 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
1332 COLOR_MAP(DEFAULT),
1333 COLOR_MAP(BLACK),
1334 COLOR_MAP(BLUE),
1335 COLOR_MAP(CYAN),
1336 COLOR_MAP(GREEN),
1337 COLOR_MAP(MAGENTA),
1338 COLOR_MAP(RED),
1339 COLOR_MAP(WHITE),
1340 COLOR_MAP(YELLOW),
1341 };
1343 #define set_color(color, name) \
1344 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
1346 static struct int_map attr_map[] = {
1347 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
1348 ATTR_MAP(NORMAL),
1349 ATTR_MAP(BLINK),
1350 ATTR_MAP(BOLD),
1351 ATTR_MAP(DIM),
1352 ATTR_MAP(REVERSE),
1353 ATTR_MAP(STANDOUT),
1354 ATTR_MAP(UNDERLINE),
1355 };
1357 #define set_attribute(attr, name) \
1358 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
1360 static int config_lineno;
1361 static bool config_errors;
1362 static const char *config_msg;
1364 /* Wants: object fgcolor bgcolor [attr] */
1365 static int
1366 option_color_command(int argc, const char *argv[])
1367 {
1368 struct line_info *info;
1370 if (argc != 3 && argc != 4) {
1371 config_msg = "Wrong number of arguments given to color command";
1372 return ERR;
1373 }
1375 info = get_line_info(argv[0]);
1376 if (!info) {
1377 if (!string_enum_compare(argv[0], "main-delim", strlen("main-delim"))) {
1378 info = get_line_info("delimiter");
1380 } else if (!string_enum_compare(argv[0], "main-date", strlen("main-date"))) {
1381 info = get_line_info("date");
1383 } else {
1384 config_msg = "Unknown color name";
1385 return ERR;
1386 }
1387 }
1389 if (set_color(&info->fg, argv[1]) == ERR ||
1390 set_color(&info->bg, argv[2]) == ERR) {
1391 config_msg = "Unknown color";
1392 return ERR;
1393 }
1395 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
1396 config_msg = "Unknown attribute";
1397 return ERR;
1398 }
1400 return OK;
1401 }
1403 static bool parse_bool(const char *s)
1404 {
1405 return (!strcmp(s, "1") || !strcmp(s, "true") ||
1406 !strcmp(s, "yes")) ? TRUE : FALSE;
1407 }
1409 static int
1410 parse_int(const char *s, int default_value, int min, int max)
1411 {
1412 int value = atoi(s);
1414 return (value < min || value > max) ? default_value : value;
1415 }
1417 /* Wants: name = value */
1418 static int
1419 option_set_command(int argc, const char *argv[])
1420 {
1421 if (argc != 3) {
1422 config_msg = "Wrong number of arguments given to set command";
1423 return ERR;
1424 }
1426 if (strcmp(argv[1], "=")) {
1427 config_msg = "No value assigned";
1428 return ERR;
1429 }
1431 if (!strcmp(argv[0], "show-author")) {
1432 opt_author = parse_bool(argv[2]);
1433 return OK;
1434 }
1436 if (!strcmp(argv[0], "show-date")) {
1437 opt_date = parse_bool(argv[2]);
1438 return OK;
1439 }
1441 if (!strcmp(argv[0], "show-rev-graph")) {
1442 opt_rev_graph = parse_bool(argv[2]);
1443 return OK;
1444 }
1446 if (!strcmp(argv[0], "show-refs")) {
1447 opt_show_refs = parse_bool(argv[2]);
1448 return OK;
1449 }
1451 if (!strcmp(argv[0], "show-line-numbers")) {
1452 opt_line_number = parse_bool(argv[2]);
1453 return OK;
1454 }
1456 if (!strcmp(argv[0], "line-graphics")) {
1457 opt_line_graphics = parse_bool(argv[2]);
1458 return OK;
1459 }
1461 if (!strcmp(argv[0], "line-number-interval")) {
1462 opt_num_interval = parse_int(argv[2], opt_num_interval, 1, 1024);
1463 return OK;
1464 }
1466 if (!strcmp(argv[0], "author-width")) {
1467 opt_author_cols = parse_int(argv[2], opt_author_cols, 0, 1024);
1468 return OK;
1469 }
1471 if (!strcmp(argv[0], "tab-size")) {
1472 opt_tab_size = parse_int(argv[2], opt_tab_size, 1, 1024);
1473 return OK;
1474 }
1476 if (!strcmp(argv[0], "commit-encoding")) {
1477 const char *arg = argv[2];
1478 int arglen = strlen(arg);
1480 switch (arg[0]) {
1481 case '"':
1482 case '\'':
1483 if (arglen == 1 || arg[arglen - 1] != arg[0]) {
1484 config_msg = "Unmatched quotation";
1485 return ERR;
1486 }
1487 arg += 1; arglen -= 2;
1488 default:
1489 string_ncopy(opt_encoding, arg, strlen(arg));
1490 return OK;
1491 }
1492 }
1494 config_msg = "Unknown variable name";
1495 return ERR;
1496 }
1498 /* Wants: mode request key */
1499 static int
1500 option_bind_command(int argc, const char *argv[])
1501 {
1502 enum request request;
1503 int keymap;
1504 int key;
1506 if (argc < 3) {
1507 config_msg = "Wrong number of arguments given to bind command";
1508 return ERR;
1509 }
1511 if (set_keymap(&keymap, argv[0]) == ERR) {
1512 config_msg = "Unknown key map";
1513 return ERR;
1514 }
1516 key = get_key_value(argv[1]);
1517 if (key == ERR) {
1518 config_msg = "Unknown key";
1519 return ERR;
1520 }
1522 request = get_request(argv[2]);
1523 if (request == REQ_NONE) {
1524 const char *obsolete[] = { "cherry-pick" };
1525 size_t namelen = strlen(argv[2]);
1526 int i;
1528 for (i = 0; i < ARRAY_SIZE(obsolete); i++) {
1529 if (namelen == strlen(obsolete[i]) &&
1530 !string_enum_compare(obsolete[i], argv[2], namelen)) {
1531 config_msg = "Obsolete request name";
1532 return ERR;
1533 }
1534 }
1535 }
1536 if (request == REQ_NONE && *argv[2]++ == '!')
1537 request = add_run_request(keymap, key, argc - 2, argv + 2);
1538 if (request == REQ_NONE) {
1539 config_msg = "Unknown request name";
1540 return ERR;
1541 }
1543 add_keybinding(keymap, request, key);
1545 return OK;
1546 }
1548 static int
1549 set_option(const char *opt, char *value)
1550 {
1551 const char *argv[SIZEOF_ARG];
1552 int argc = 0;
1554 if (!argv_from_string(argv, &argc, value)) {
1555 config_msg = "Too many option arguments";
1556 return ERR;
1557 }
1559 if (!strcmp(opt, "color"))
1560 return option_color_command(argc, argv);
1562 if (!strcmp(opt, "set"))
1563 return option_set_command(argc, argv);
1565 if (!strcmp(opt, "bind"))
1566 return option_bind_command(argc, argv);
1568 config_msg = "Unknown option command";
1569 return ERR;
1570 }
1572 static int
1573 read_option(char *opt, size_t optlen, char *value, size_t valuelen)
1574 {
1575 int status = OK;
1577 config_lineno++;
1578 config_msg = "Internal error";
1580 /* Check for comment markers, since read_properties() will
1581 * only ensure opt and value are split at first " \t". */
1582 optlen = strcspn(opt, "#");
1583 if (optlen == 0)
1584 return OK;
1586 if (opt[optlen] != 0) {
1587 config_msg = "No option value";
1588 status = ERR;
1590 } else {
1591 /* Look for comment endings in the value. */
1592 size_t len = strcspn(value, "#");
1594 if (len < valuelen) {
1595 valuelen = len;
1596 value[valuelen] = 0;
1597 }
1599 status = set_option(opt, value);
1600 }
1602 if (status == ERR) {
1603 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1604 config_lineno, (int) optlen, opt, config_msg);
1605 config_errors = TRUE;
1606 }
1608 /* Always keep going if errors are encountered. */
1609 return OK;
1610 }
1612 static void
1613 load_option_file(const char *path)
1614 {
1615 struct io io = {};
1617 /* It's ok that the file doesn't exist. */
1618 if (!io_open(&io, path))
1619 return;
1621 config_lineno = 0;
1622 config_errors = FALSE;
1624 if (read_properties(&io, " \t", read_option) == ERR ||
1625 config_errors == TRUE)
1626 fprintf(stderr, "Errors while loading %s.\n", path);
1627 }
1629 static int
1630 load_options(void)
1631 {
1632 const char *home = getenv("HOME");
1633 const char *tigrc_user = getenv("TIGRC_USER");
1634 const char *tigrc_system = getenv("TIGRC_SYSTEM");
1635 char buf[SIZEOF_STR];
1637 add_builtin_run_requests();
1639 if (!tigrc_system) {
1640 if (!string_format(buf, "%s/tigrc", SYSCONFDIR))
1641 return ERR;
1642 tigrc_system = buf;
1643 }
1644 load_option_file(tigrc_system);
1646 if (!tigrc_user) {
1647 if (!home || !string_format(buf, "%s/.tigrc", home))
1648 return ERR;
1649 tigrc_user = buf;
1650 }
1651 load_option_file(tigrc_user);
1653 return OK;
1654 }
1657 /*
1658 * The viewer
1659 */
1661 struct view;
1662 struct view_ops;
1664 /* The display array of active views and the index of the current view. */
1665 static struct view *display[2];
1666 static unsigned int current_view;
1668 /* Reading from the prompt? */
1669 static bool input_mode = FALSE;
1671 #define foreach_displayed_view(view, i) \
1672 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1674 #define displayed_views() (display[1] != NULL ? 2 : 1)
1676 /* Current head and commit ID */
1677 static char ref_blob[SIZEOF_REF] = "";
1678 static char ref_commit[SIZEOF_REF] = "HEAD";
1679 static char ref_head[SIZEOF_REF] = "HEAD";
1681 struct view {
1682 const char *name; /* View name */
1683 const char *cmd_env; /* Command line set via environment */
1684 const char *id; /* Points to either of ref_{head,commit,blob} */
1686 struct view_ops *ops; /* View operations */
1688 enum keymap keymap; /* What keymap does this view have */
1689 bool git_dir; /* Whether the view requires a git directory. */
1691 char ref[SIZEOF_REF]; /* Hovered commit reference */
1692 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1694 int height, width; /* The width and height of the main window */
1695 WINDOW *win; /* The main window */
1696 WINDOW *title; /* The title window living below the main window */
1698 /* Navigation */
1699 unsigned long offset; /* Offset of the window top */
1700 unsigned long lineno; /* Current line number */
1702 /* Searching */
1703 char grep[SIZEOF_STR]; /* Search string */
1704 regex_t *regex; /* Pre-compiled regex */
1706 /* If non-NULL, points to the view that opened this view. If this view
1707 * is closed tig will switch back to the parent view. */
1708 struct view *parent;
1710 /* Buffering */
1711 size_t lines; /* Total number of lines */
1712 struct line *line; /* Line index */
1713 size_t line_alloc; /* Total number of allocated lines */
1714 size_t line_size; /* Total number of used lines */
1715 unsigned int digits; /* Number of digits in the lines member. */
1717 /* Drawing */
1718 struct line *curline; /* Line currently being drawn. */
1719 enum line_type curtype; /* Attribute currently used for drawing. */
1720 unsigned long col; /* Column when drawing. */
1722 /* Loading */
1723 struct io io;
1724 struct io *pipe;
1725 time_t start_time;
1726 };
1728 struct view_ops {
1729 /* What type of content being displayed. Used in the title bar. */
1730 const char *type;
1731 /* Default command arguments. */
1732 const char **argv;
1733 /* Open and reads in all view content. */
1734 bool (*open)(struct view *view);
1735 /* Read one line; updates view->line. */
1736 bool (*read)(struct view *view, char *data);
1737 /* Draw one line; @lineno must be < view->height. */
1738 bool (*draw)(struct view *view, struct line *line, unsigned int lineno);
1739 /* Depending on view handle a special requests. */
1740 enum request (*request)(struct view *view, enum request request, struct line *line);
1741 /* Search for regex in a line. */
1742 bool (*grep)(struct view *view, struct line *line);
1743 /* Select line */
1744 void (*select)(struct view *view, struct line *line);
1745 };
1747 static struct view_ops blame_ops;
1748 static struct view_ops blob_ops;
1749 static struct view_ops diff_ops;
1750 static struct view_ops help_ops;
1751 static struct view_ops log_ops;
1752 static struct view_ops main_ops;
1753 static struct view_ops pager_ops;
1754 static struct view_ops stage_ops;
1755 static struct view_ops status_ops;
1756 static struct view_ops tree_ops;
1758 #define VIEW_STR(name, env, ref, ops, map, git) \
1759 { name, #env, ref, ops, map, git }
1761 #define VIEW_(id, name, ops, git, ref) \
1762 VIEW_STR(name, TIG_##id##_CMD, ref, ops, KEYMAP_##id, git)
1765 static struct view views[] = {
1766 VIEW_(MAIN, "main", &main_ops, TRUE, ref_head),
1767 VIEW_(DIFF, "diff", &diff_ops, TRUE, ref_commit),
1768 VIEW_(LOG, "log", &log_ops, TRUE, ref_head),
1769 VIEW_(TREE, "tree", &tree_ops, TRUE, ref_commit),
1770 VIEW_(BLOB, "blob", &blob_ops, TRUE, ref_blob),
1771 VIEW_(BLAME, "blame", &blame_ops, TRUE, ref_commit),
1772 VIEW_(HELP, "help", &help_ops, FALSE, ""),
1773 VIEW_(PAGER, "pager", &pager_ops, FALSE, "stdin"),
1774 VIEW_(STATUS, "status", &status_ops, TRUE, ""),
1775 VIEW_(STAGE, "stage", &stage_ops, TRUE, ""),
1776 };
1778 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1779 #define VIEW_REQ(view) ((view) - views + REQ_OFFSET + 1)
1781 #define foreach_view(view, i) \
1782 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1784 #define view_is_displayed(view) \
1785 (view == display[0] || view == display[1])
1788 enum line_graphic {
1789 LINE_GRAPHIC_VLINE
1790 };
1792 static int line_graphics[] = {
1793 /* LINE_GRAPHIC_VLINE: */ '|'
1794 };
1796 static inline void
1797 set_view_attr(struct view *view, enum line_type type)
1798 {
1799 if (!view->curline->selected && view->curtype != type) {
1800 wattrset(view->win, get_line_attr(type));
1801 wchgat(view->win, -1, 0, type, NULL);
1802 view->curtype = type;
1803 }
1804 }
1806 static int
1807 draw_chars(struct view *view, enum line_type type, const char *string,
1808 int max_len, bool use_tilde)
1809 {
1810 int len = 0;
1811 int col = 0;
1812 int trimmed = FALSE;
1814 if (max_len <= 0)
1815 return 0;
1817 if (opt_utf8) {
1818 len = utf8_length(string, &col, max_len, &trimmed, use_tilde);
1819 } else {
1820 col = len = strlen(string);
1821 if (len > max_len) {
1822 if (use_tilde) {
1823 max_len -= 1;
1824 }
1825 col = len = max_len;
1826 trimmed = TRUE;
1827 }
1828 }
1830 set_view_attr(view, type);
1831 waddnstr(view->win, string, len);
1832 if (trimmed && use_tilde) {
1833 set_view_attr(view, LINE_DELIMITER);
1834 waddch(view->win, '~');
1835 col++;
1836 }
1838 return col;
1839 }
1841 static int
1842 draw_space(struct view *view, enum line_type type, int max, int spaces)
1843 {
1844 static char space[] = " ";
1845 int col = 0;
1847 spaces = MIN(max, spaces);
1849 while (spaces > 0) {
1850 int len = MIN(spaces, sizeof(space) - 1);
1852 col += draw_chars(view, type, space, spaces, FALSE);
1853 spaces -= len;
1854 }
1856 return col;
1857 }
1859 static bool
1860 draw_lineno(struct view *view, unsigned int lineno)
1861 {
1862 char number[10];
1863 int digits3 = view->digits < 3 ? 3 : view->digits;
1864 int max_number = MIN(digits3, STRING_SIZE(number));
1865 int max = view->width - view->col;
1866 int col;
1868 if (max < max_number)
1869 max_number = max;
1871 lineno += view->offset + 1;
1872 if (lineno == 1 || (lineno % opt_num_interval) == 0) {
1873 static char fmt[] = "%1ld";
1875 if (view->digits <= 9)
1876 fmt[1] = '0' + digits3;
1878 if (!string_format(number, fmt, lineno))
1879 number[0] = 0;
1880 col = draw_chars(view, LINE_LINE_NUMBER, number, max_number, TRUE);
1881 } else {
1882 col = draw_space(view, LINE_LINE_NUMBER, max_number, max_number);
1883 }
1885 if (col < max) {
1886 set_view_attr(view, LINE_DEFAULT);
1887 waddch(view->win, line_graphics[LINE_GRAPHIC_VLINE]);
1888 col++;
1889 }
1891 if (col < max)
1892 col += draw_space(view, LINE_DEFAULT, max - col, 1);
1893 view->col += col;
1895 return view->width - view->col <= 0;
1896 }
1898 static bool
1899 draw_text(struct view *view, enum line_type type, const char *string, bool trim)
1900 {
1901 view->col += draw_chars(view, type, string, view->width - view->col, trim);
1902 return view->width - view->col <= 0;
1903 }
1905 static bool
1906 draw_graphic(struct view *view, enum line_type type, chtype graphic[], size_t size)
1907 {
1908 int max = view->width - view->col;
1909 int i;
1911 if (max < size)
1912 size = max;
1914 set_view_attr(view, type);
1915 /* Using waddch() instead of waddnstr() ensures that
1916 * they'll be rendered correctly for the cursor line. */
1917 for (i = 0; i < size; i++)
1918 waddch(view->win, graphic[i]);
1920 view->col += size;
1921 if (size < max) {
1922 waddch(view->win, ' ');
1923 view->col++;
1924 }
1926 return view->width - view->col <= 0;
1927 }
1929 static bool
1930 draw_field(struct view *view, enum line_type type, const char *text, int len, bool trim)
1931 {
1932 int max = MIN(view->width - view->col, len);
1933 int col;
1935 if (text)
1936 col = draw_chars(view, type, text, max - 1, trim);
1937 else
1938 col = draw_space(view, type, max - 1, max - 1);
1940 view->col += col + draw_space(view, LINE_DEFAULT, max - col, max - col);
1941 return view->width - view->col <= 0;
1942 }
1944 static bool
1945 draw_date(struct view *view, struct tm *time)
1946 {
1947 char buf[DATE_COLS];
1948 char *date;
1949 int timelen = 0;
1951 if (time)
1952 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, time);
1953 date = timelen ? buf : NULL;
1955 return draw_field(view, LINE_DATE, date, DATE_COLS, FALSE);
1956 }
1958 static bool
1959 draw_view_line(struct view *view, unsigned int lineno)
1960 {
1961 struct line *line;
1962 bool selected = (view->offset + lineno == view->lineno);
1963 bool draw_ok;
1965 assert(view_is_displayed(view));
1967 if (view->offset + lineno >= view->lines)
1968 return FALSE;
1970 line = &view->line[view->offset + lineno];
1972 wmove(view->win, lineno, 0);
1973 view->col = 0;
1974 view->curline = line;
1975 view->curtype = LINE_NONE;
1976 line->selected = FALSE;
1978 if (selected) {
1979 set_view_attr(view, LINE_CURSOR);
1980 line->selected = TRUE;
1981 view->ops->select(view, line);
1982 } else if (line->selected) {
1983 wclrtoeol(view->win);
1984 }
1986 scrollok(view->win, FALSE);
1987 draw_ok = view->ops->draw(view, line, lineno);
1988 scrollok(view->win, TRUE);
1990 return draw_ok;
1991 }
1993 static void
1994 redraw_view_dirty(struct view *view)
1995 {
1996 bool dirty = FALSE;
1997 int lineno;
1999 for (lineno = 0; lineno < view->height; lineno++) {
2000 struct line *line = &view->line[view->offset + lineno];
2002 if (!line->dirty)
2003 continue;
2004 line->dirty = 0;
2005 dirty = TRUE;
2006 if (!draw_view_line(view, lineno))
2007 break;
2008 }
2010 if (!dirty)
2011 return;
2012 redrawwin(view->win);
2013 if (input_mode)
2014 wnoutrefresh(view->win);
2015 else
2016 wrefresh(view->win);
2017 }
2019 static void
2020 redraw_view_from(struct view *view, int lineno)
2021 {
2022 assert(0 <= lineno && lineno < view->height);
2024 for (; lineno < view->height; lineno++) {
2025 if (!draw_view_line(view, lineno))
2026 break;
2027 }
2029 redrawwin(view->win);
2030 if (input_mode)
2031 wnoutrefresh(view->win);
2032 else
2033 wrefresh(view->win);
2034 }
2036 static void
2037 redraw_view(struct view *view)
2038 {
2039 wclear(view->win);
2040 redraw_view_from(view, 0);
2041 }
2044 static void
2045 update_view_title(struct view *view)
2046 {
2047 char buf[SIZEOF_STR];
2048 char state[SIZEOF_STR];
2049 size_t bufpos = 0, statelen = 0;
2051 assert(view_is_displayed(view));
2053 if (view != VIEW(REQ_VIEW_STATUS) && (view->lines || view->pipe)) {
2054 unsigned int view_lines = view->offset + view->height;
2055 unsigned int lines = view->lines
2056 ? MIN(view_lines, view->lines) * 100 / view->lines
2057 : 0;
2059 string_format_from(state, &statelen, "- %s %d of %d (%d%%)",
2060 view->ops->type,
2061 view->lineno + 1,
2062 view->lines,
2063 lines);
2065 if (view->pipe) {
2066 time_t secs = time(NULL) - view->start_time;
2068 /* Three git seconds are a long time ... */
2069 if (secs > 2)
2070 string_format_from(state, &statelen, " %lds", secs);
2071 }
2072 }
2074 string_format_from(buf, &bufpos, "[%s]", view->name);
2075 if (*view->ref && bufpos < view->width) {
2076 size_t refsize = strlen(view->ref);
2077 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
2079 if (minsize < view->width)
2080 refsize = view->width - minsize + 7;
2081 string_format_from(buf, &bufpos, " %.*s", (int) refsize, view->ref);
2082 }
2084 if (statelen && bufpos < view->width) {
2085 string_format_from(buf, &bufpos, " %s", state);
2086 }
2088 if (view == display[current_view])
2089 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
2090 else
2091 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
2093 mvwaddnstr(view->title, 0, 0, buf, bufpos);
2094 wclrtoeol(view->title);
2095 wmove(view->title, 0, view->width - 1);
2097 if (input_mode)
2098 wnoutrefresh(view->title);
2099 else
2100 wrefresh(view->title);
2101 }
2103 static void
2104 resize_display(void)
2105 {
2106 int offset, i;
2107 struct view *base = display[0];
2108 struct view *view = display[1] ? display[1] : display[0];
2110 /* Setup window dimensions */
2112 getmaxyx(stdscr, base->height, base->width);
2114 /* Make room for the status window. */
2115 base->height -= 1;
2117 if (view != base) {
2118 /* Horizontal split. */
2119 view->width = base->width;
2120 view->height = SCALE_SPLIT_VIEW(base->height);
2121 base->height -= view->height;
2123 /* Make room for the title bar. */
2124 view->height -= 1;
2125 }
2127 /* Make room for the title bar. */
2128 base->height -= 1;
2130 offset = 0;
2132 foreach_displayed_view (view, i) {
2133 if (!view->win) {
2134 view->win = newwin(view->height, 0, offset, 0);
2135 if (!view->win)
2136 die("Failed to create %s view", view->name);
2138 scrollok(view->win, TRUE);
2140 view->title = newwin(1, 0, offset + view->height, 0);
2141 if (!view->title)
2142 die("Failed to create title window");
2144 } else {
2145 wresize(view->win, view->height, view->width);
2146 mvwin(view->win, offset, 0);
2147 mvwin(view->title, offset + view->height, 0);
2148 }
2150 offset += view->height + 1;
2151 }
2152 }
2154 static void
2155 redraw_display(void)
2156 {
2157 struct view *view;
2158 int i;
2160 foreach_displayed_view (view, i) {
2161 redraw_view(view);
2162 update_view_title(view);
2163 }
2164 }
2166 static void
2167 update_display_cursor(struct view *view)
2168 {
2169 /* Move the cursor to the right-most column of the cursor line.
2170 *
2171 * XXX: This could turn out to be a bit expensive, but it ensures that
2172 * the cursor does not jump around. */
2173 if (view->lines) {
2174 wmove(view->win, view->lineno - view->offset, view->width - 1);
2175 wrefresh(view->win);
2176 }
2177 }
2179 /*
2180 * Navigation
2181 */
2183 /* Scrolling backend */
2184 static void
2185 do_scroll_view(struct view *view, int lines)
2186 {
2187 bool redraw_current_line = FALSE;
2189 /* The rendering expects the new offset. */
2190 view->offset += lines;
2192 assert(0 <= view->offset && view->offset < view->lines);
2193 assert(lines);
2195 /* Move current line into the view. */
2196 if (view->lineno < view->offset) {
2197 view->lineno = view->offset;
2198 redraw_current_line = TRUE;
2199 } else if (view->lineno >= view->offset + view->height) {
2200 view->lineno = view->offset + view->height - 1;
2201 redraw_current_line = TRUE;
2202 }
2204 assert(view->offset <= view->lineno && view->lineno < view->lines);
2206 /* Redraw the whole screen if scrolling is pointless. */
2207 if (view->height < ABS(lines)) {
2208 redraw_view(view);
2210 } else {
2211 int line = lines > 0 ? view->height - lines : 0;
2212 int end = line + ABS(lines);
2214 wscrl(view->win, lines);
2216 for (; line < end; line++) {
2217 if (!draw_view_line(view, line))
2218 break;
2219 }
2221 if (redraw_current_line)
2222 draw_view_line(view, view->lineno - view->offset);
2223 }
2225 redrawwin(view->win);
2226 wrefresh(view->win);
2227 report("");
2228 }
2230 /* Scroll frontend */
2231 static void
2232 scroll_view(struct view *view, enum request request)
2233 {
2234 int lines = 1;
2236 assert(view_is_displayed(view));
2238 switch (request) {
2239 case REQ_SCROLL_PAGE_DOWN:
2240 lines = view->height;
2241 case REQ_SCROLL_LINE_DOWN:
2242 if (view->offset + lines > view->lines)
2243 lines = view->lines - view->offset;
2245 if (lines == 0 || view->offset + view->height >= view->lines) {
2246 report("Cannot scroll beyond the last line");
2247 return;
2248 }
2249 break;
2251 case REQ_SCROLL_PAGE_UP:
2252 lines = view->height;
2253 case REQ_SCROLL_LINE_UP:
2254 if (lines > view->offset)
2255 lines = view->offset;
2257 if (lines == 0) {
2258 report("Cannot scroll beyond the first line");
2259 return;
2260 }
2262 lines = -lines;
2263 break;
2265 default:
2266 die("request %d not handled in switch", request);
2267 }
2269 do_scroll_view(view, lines);
2270 }
2272 /* Cursor moving */
2273 static void
2274 move_view(struct view *view, enum request request)
2275 {
2276 int scroll_steps = 0;
2277 int steps;
2279 switch (request) {
2280 case REQ_MOVE_FIRST_LINE:
2281 steps = -view->lineno;
2282 break;
2284 case REQ_MOVE_LAST_LINE:
2285 steps = view->lines - view->lineno - 1;
2286 break;
2288 case REQ_MOVE_PAGE_UP:
2289 steps = view->height > view->lineno
2290 ? -view->lineno : -view->height;
2291 break;
2293 case REQ_MOVE_PAGE_DOWN:
2294 steps = view->lineno + view->height >= view->lines
2295 ? view->lines - view->lineno - 1 : view->height;
2296 break;
2298 case REQ_MOVE_UP:
2299 steps = -1;
2300 break;
2302 case REQ_MOVE_DOWN:
2303 steps = 1;
2304 break;
2306 default:
2307 die("request %d not handled in switch", request);
2308 }
2310 if (steps <= 0 && view->lineno == 0) {
2311 report("Cannot move beyond the first line");
2312 return;
2314 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
2315 report("Cannot move beyond the last line");
2316 return;
2317 }
2319 /* Move the current line */
2320 view->lineno += steps;
2321 assert(0 <= view->lineno && view->lineno < view->lines);
2323 /* Check whether the view needs to be scrolled */
2324 if (view->lineno < view->offset ||
2325 view->lineno >= view->offset + view->height) {
2326 scroll_steps = steps;
2327 if (steps < 0 && -steps > view->offset) {
2328 scroll_steps = -view->offset;
2330 } else if (steps > 0) {
2331 if (view->lineno == view->lines - 1 &&
2332 view->lines > view->height) {
2333 scroll_steps = view->lines - view->offset - 1;
2334 if (scroll_steps >= view->height)
2335 scroll_steps -= view->height - 1;
2336 }
2337 }
2338 }
2340 if (!view_is_displayed(view)) {
2341 view->offset += scroll_steps;
2342 assert(0 <= view->offset && view->offset < view->lines);
2343 view->ops->select(view, &view->line[view->lineno]);
2344 return;
2345 }
2347 /* Repaint the old "current" line if we be scrolling */
2348 if (ABS(steps) < view->height)
2349 draw_view_line(view, view->lineno - steps - view->offset);
2351 if (scroll_steps) {
2352 do_scroll_view(view, scroll_steps);
2353 return;
2354 }
2356 /* Draw the current line */
2357 draw_view_line(view, view->lineno - view->offset);
2359 redrawwin(view->win);
2360 wrefresh(view->win);
2361 report("");
2362 }
2365 /*
2366 * Searching
2367 */
2369 static void search_view(struct view *view, enum request request);
2371 static bool
2372 find_next_line(struct view *view, unsigned long lineno, struct line *line)
2373 {
2374 assert(view_is_displayed(view));
2376 if (!view->ops->grep(view, line))
2377 return FALSE;
2379 if (lineno - view->offset >= view->height) {
2380 view->offset = lineno;
2381 view->lineno = lineno;
2382 redraw_view(view);
2384 } else {
2385 unsigned long old_lineno = view->lineno - view->offset;
2387 view->lineno = lineno;
2388 draw_view_line(view, old_lineno);
2390 draw_view_line(view, view->lineno - view->offset);
2391 redrawwin(view->win);
2392 wrefresh(view->win);
2393 }
2395 report("Line %ld matches '%s'", lineno + 1, view->grep);
2396 return TRUE;
2397 }
2399 static void
2400 find_next(struct view *view, enum request request)
2401 {
2402 unsigned long lineno = view->lineno;
2403 int direction;
2405 if (!*view->grep) {
2406 if (!*opt_search)
2407 report("No previous search");
2408 else
2409 search_view(view, request);
2410 return;
2411 }
2413 switch (request) {
2414 case REQ_SEARCH:
2415 case REQ_FIND_NEXT:
2416 direction = 1;
2417 break;
2419 case REQ_SEARCH_BACK:
2420 case REQ_FIND_PREV:
2421 direction = -1;
2422 break;
2424 default:
2425 return;
2426 }
2428 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
2429 lineno += direction;
2431 /* Note, lineno is unsigned long so will wrap around in which case it
2432 * will become bigger than view->lines. */
2433 for (; lineno < view->lines; lineno += direction) {
2434 struct line *line = &view->line[lineno];
2436 if (find_next_line(view, lineno, line))
2437 return;
2438 }
2440 report("No match found for '%s'", view->grep);
2441 }
2443 static void
2444 search_view(struct view *view, enum request request)
2445 {
2446 int regex_err;
2448 if (view->regex) {
2449 regfree(view->regex);
2450 *view->grep = 0;
2451 } else {
2452 view->regex = calloc(1, sizeof(*view->regex));
2453 if (!view->regex)
2454 return;
2455 }
2457 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
2458 if (regex_err != 0) {
2459 char buf[SIZEOF_STR] = "unknown error";
2461 regerror(regex_err, view->regex, buf, sizeof(buf));
2462 report("Search failed: %s", buf);
2463 return;
2464 }
2466 string_copy(view->grep, opt_search);
2468 find_next(view, request);
2469 }
2471 /*
2472 * Incremental updating
2473 */
2475 static void
2476 reset_view(struct view *view)
2477 {
2478 int i;
2480 for (i = 0; i < view->lines; i++)
2481 free(view->line[i].data);
2482 free(view->line);
2484 view->line = NULL;
2485 view->offset = 0;
2486 view->lines = 0;
2487 view->lineno = 0;
2488 view->line_size = 0;
2489 view->line_alloc = 0;
2490 view->vid[0] = 0;
2491 }
2493 static void
2494 free_argv(const char *argv[])
2495 {
2496 int argc;
2498 for (argc = 0; argv[argc]; argc++)
2499 free((void *) argv[argc]);
2500 }
2502 static bool
2503 format_argv(const char *dst_argv[], const char *src_argv[], enum format_flags flags)
2504 {
2505 char buf[SIZEOF_STR];
2506 int argc;
2507 bool noreplace = flags == FORMAT_NONE;
2509 free_argv(dst_argv);
2511 for (argc = 0; src_argv[argc]; argc++) {
2512 const char *arg = src_argv[argc];
2513 size_t bufpos = 0;
2515 while (arg) {
2516 char *next = strstr(arg, "%(");
2517 int len = next - arg;
2518 const char *value;
2520 if (!next || noreplace) {
2521 if (flags == FORMAT_DASH && !strcmp(arg, "--"))
2522 noreplace = TRUE;
2523 len = strlen(arg);
2524 value = "";
2526 } else if (!prefixcmp(next, "%(directory)")) {
2527 value = opt_path;
2529 } else if (!prefixcmp(next, "%(file)")) {
2530 value = opt_file;
2532 } else if (!prefixcmp(next, "%(ref)")) {
2533 value = *opt_ref ? opt_ref : "HEAD";
2535 } else if (!prefixcmp(next, "%(head)")) {
2536 value = ref_head;
2538 } else if (!prefixcmp(next, "%(commit)")) {
2539 value = ref_commit;
2541 } else if (!prefixcmp(next, "%(blob)")) {
2542 value = ref_blob;
2544 } else {
2545 report("Unknown replacement: `%s`", next);
2546 return FALSE;
2547 }
2549 if (!string_format_from(buf, &bufpos, "%.*s%s", len, arg, value))
2550 return FALSE;
2552 arg = next && !noreplace ? strchr(next, ')') + 1 : NULL;
2553 }
2555 dst_argv[argc] = strdup(buf);
2556 if (!dst_argv[argc])
2557 break;
2558 }
2560 dst_argv[argc] = NULL;
2562 return src_argv[argc] == NULL;
2563 }
2565 static void
2566 end_update(struct view *view, bool force)
2567 {
2568 if (!view->pipe)
2569 return;
2570 while (!view->ops->read(view, NULL))
2571 if (!force)
2572 return;
2573 set_nonblocking_input(FALSE);
2574 if (force)
2575 kill_io(view->pipe);
2576 done_io(view->pipe);
2577 view->pipe = NULL;
2578 }
2580 static void
2581 setup_update(struct view *view, const char *vid)
2582 {
2583 set_nonblocking_input(TRUE);
2584 reset_view(view);
2585 string_copy_rev(view->vid, vid);
2586 view->pipe = &view->io;
2587 view->start_time = time(NULL);
2588 }
2590 static bool
2591 prepare_update(struct view *view, const char *argv[], const char *dir,
2592 enum format_flags flags)
2593 {
2594 if (view->pipe)
2595 end_update(view, TRUE);
2596 return init_io_rd(&view->io, argv, dir, flags);
2597 }
2599 static bool
2600 prepare_update_file(struct view *view, const char *name)
2601 {
2602 if (view->pipe)
2603 end_update(view, TRUE);
2604 return io_open(&view->io, name);
2605 }
2607 static bool
2608 begin_update(struct view *view, bool refresh)
2609 {
2610 if (refresh) {
2611 if (!start_io(&view->io))
2612 return FALSE;
2614 } else {
2615 if (view == VIEW(REQ_VIEW_TREE) && strcmp(view->vid, view->id))
2616 opt_path[0] = 0;
2618 if (!run_io_rd(&view->io, view->ops->argv, FORMAT_ALL))
2619 return FALSE;
2621 /* Put the current ref_* value to the view title ref
2622 * member. This is needed by the blob view. Most other
2623 * views sets it automatically after loading because the
2624 * first line is a commit line. */
2625 string_copy_rev(view->ref, view->id);
2626 }
2628 setup_update(view, view->id);
2630 return TRUE;
2631 }
2633 #define ITEM_CHUNK_SIZE 256
2634 static void *
2635 realloc_items(void *mem, size_t *size, size_t new_size, size_t item_size)
2636 {
2637 size_t num_chunks = *size / ITEM_CHUNK_SIZE;
2638 size_t num_chunks_new = (new_size + ITEM_CHUNK_SIZE - 1) / ITEM_CHUNK_SIZE;
2640 if (mem == NULL || num_chunks != num_chunks_new) {
2641 *size = num_chunks_new * ITEM_CHUNK_SIZE;
2642 mem = realloc(mem, *size * item_size);
2643 }
2645 return mem;
2646 }
2648 static struct line *
2649 realloc_lines(struct view *view, size_t line_size)
2650 {
2651 size_t alloc = view->line_alloc;
2652 struct line *tmp = realloc_items(view->line, &alloc, line_size,
2653 sizeof(*view->line));
2655 if (!tmp)
2656 return NULL;
2658 view->line = tmp;
2659 view->line_alloc = alloc;
2660 view->line_size = line_size;
2661 return view->line;
2662 }
2664 static bool
2665 update_view(struct view *view)
2666 {
2667 char out_buffer[BUFSIZ * 2];
2668 char *line;
2669 /* The number of lines to read. If too low it will cause too much
2670 * redrawing (and possible flickering), if too high responsiveness
2671 * will suffer. */
2672 unsigned long lines = view->height;
2673 int redraw_from = -1;
2675 if (!view->pipe)
2676 return TRUE;
2678 /* Only redraw if lines are visible. */
2679 if (view->offset + view->height >= view->lines)
2680 redraw_from = view->lines - view->offset;
2682 /* FIXME: This is probably not perfect for backgrounded views. */
2683 if (!realloc_lines(view, view->lines + lines))
2684 goto alloc_error;
2686 while ((line = io_get(view->pipe, '\n', TRUE))) {
2687 size_t linelen = strlen(line);
2689 if (opt_iconv != ICONV_NONE) {
2690 ICONV_CONST char *inbuf = line;
2691 size_t inlen = linelen;
2693 char *outbuf = out_buffer;
2694 size_t outlen = sizeof(out_buffer);
2696 size_t ret;
2698 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
2699 if (ret != (size_t) -1) {
2700 line = out_buffer;
2701 linelen = strlen(out_buffer);
2702 }
2703 }
2705 if (!view->ops->read(view, line))
2706 goto alloc_error;
2708 if (lines-- == 1)
2709 break;
2710 }
2712 {
2713 int digits;
2715 lines = view->lines;
2716 for (digits = 0; lines; digits++)
2717 lines /= 10;
2719 /* Keep the displayed view in sync with line number scaling. */
2720 if (digits != view->digits) {
2721 view->digits = digits;
2722 redraw_from = 0;
2723 }
2724 }
2726 if (io_error(view->pipe)) {
2727 report("Failed to read: %s", io_strerror(view->pipe));
2728 end_update(view, TRUE);
2730 } else if (io_eof(view->pipe)) {
2731 report("");
2732 end_update(view, FALSE);
2733 }
2735 if (!view_is_displayed(view))
2736 return TRUE;
2738 if (view == VIEW(REQ_VIEW_TREE)) {
2739 /* Clear the view and redraw everything since the tree sorting
2740 * might have rearranged things. */
2741 redraw_view(view);
2743 } else if (redraw_from >= 0) {
2744 /* If this is an incremental update, redraw the previous line
2745 * since for commits some members could have changed when
2746 * loading the main view. */
2747 if (redraw_from > 0)
2748 redraw_from--;
2750 /* Since revision graph visualization requires knowledge
2751 * about the parent commit, it causes a further one-off
2752 * needed to be redrawn for incremental updates. */
2753 if (redraw_from > 0 && opt_rev_graph)
2754 redraw_from--;
2756 /* Incrementally draw avoids flickering. */
2757 redraw_view_from(view, redraw_from);
2758 }
2760 if (view == VIEW(REQ_VIEW_BLAME))
2761 redraw_view_dirty(view);
2763 /* Update the title _after_ the redraw so that if the redraw picks up a
2764 * commit reference in view->ref it'll be available here. */
2765 update_view_title(view);
2766 return TRUE;
2768 alloc_error:
2769 report("Allocation failure");
2770 end_update(view, TRUE);
2771 return FALSE;
2772 }
2774 static struct line *
2775 add_line_data(struct view *view, void *data, enum line_type type)
2776 {
2777 struct line *line = &view->line[view->lines++];
2779 memset(line, 0, sizeof(*line));
2780 line->type = type;
2781 line->data = data;
2783 return line;
2784 }
2786 static struct line *
2787 add_line_text(struct view *view, const char *text, enum line_type type)
2788 {
2789 char *data = text ? strdup(text) : NULL;
2791 return data ? add_line_data(view, data, type) : NULL;
2792 }
2795 /*
2796 * View opening
2797 */
2799 enum open_flags {
2800 OPEN_DEFAULT = 0, /* Use default view switching. */
2801 OPEN_SPLIT = 1, /* Split current view. */
2802 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
2803 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
2804 OPEN_NOMAXIMIZE = 8, /* Do not maximize the current view. */
2805 OPEN_REFRESH = 16, /* Refresh view using previous command. */
2806 OPEN_PREPARED = 32, /* Open already prepared command. */
2807 };
2809 static void
2810 open_view(struct view *prev, enum request request, enum open_flags flags)
2811 {
2812 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
2813 bool split = !!(flags & OPEN_SPLIT);
2814 bool reload = !!(flags & (OPEN_RELOAD | OPEN_REFRESH | OPEN_PREPARED));
2815 bool nomaximize = !!(flags & (OPEN_NOMAXIMIZE | OPEN_REFRESH));
2816 struct view *view = VIEW(request);
2817 int nviews = displayed_views();
2818 struct view *base_view = display[0];
2820 if (view == prev && nviews == 1 && !reload) {
2821 report("Already in %s view", view->name);
2822 return;
2823 }
2825 if (view->git_dir && !opt_git_dir[0]) {
2826 report("The %s view is disabled in pager view", view->name);
2827 return;
2828 }
2830 if (split) {
2831 display[1] = view;
2832 if (!backgrounded)
2833 current_view = 1;
2834 } else if (!nomaximize) {
2835 /* Maximize the current view. */
2836 memset(display, 0, sizeof(display));
2837 current_view = 0;
2838 display[current_view] = view;
2839 }
2841 /* Resize the view when switching between split- and full-screen,
2842 * or when switching between two different full-screen views. */
2843 if (nviews != displayed_views() ||
2844 (nviews == 1 && base_view != display[0]))
2845 resize_display();
2847 if (view->pipe)
2848 end_update(view, TRUE);
2850 if (view->ops->open) {
2851 if (!view->ops->open(view)) {
2852 report("Failed to load %s view", view->name);
2853 return;
2854 }
2856 } else if ((reload || strcmp(view->vid, view->id)) &&
2857 !begin_update(view, flags & (OPEN_REFRESH | OPEN_PREPARED))) {
2858 report("Failed to load %s view", view->name);
2859 return;
2860 }
2862 if (split && prev->lineno - prev->offset >= prev->height) {
2863 /* Take the title line into account. */
2864 int lines = prev->lineno - prev->offset - prev->height + 1;
2866 /* Scroll the view that was split if the current line is
2867 * outside the new limited view. */
2868 do_scroll_view(prev, lines);
2869 }
2871 if (prev && view != prev) {
2872 if (split && !backgrounded) {
2873 /* "Blur" the previous view. */
2874 update_view_title(prev);
2875 }
2877 view->parent = prev;
2878 }
2880 if (view->pipe && view->lines == 0) {
2881 /* Clear the old view and let the incremental updating refill
2882 * the screen. */
2883 werase(view->win);
2884 report("");
2885 } else if (view_is_displayed(view)) {
2886 redraw_view(view);
2887 report("");
2888 }
2890 /* If the view is backgrounded the above calls to report()
2891 * won't redraw the view title. */
2892 if (backgrounded)
2893 update_view_title(view);
2894 }
2896 static void
2897 open_external_viewer(const char *argv[], const char *dir)
2898 {
2899 def_prog_mode(); /* save current tty modes */
2900 endwin(); /* restore original tty modes */
2901 run_io_fg(argv, dir);
2902 fprintf(stderr, "Press Enter to continue");
2903 getc(opt_tty);
2904 reset_prog_mode();
2905 redraw_display();
2906 }
2908 static void
2909 open_mergetool(const char *file)
2910 {
2911 const char *mergetool_argv[] = { "git", "mergetool", file, NULL };
2913 open_external_viewer(mergetool_argv, NULL);
2914 }
2916 static void
2917 open_editor(bool from_root, const char *file)
2918 {
2919 const char *editor_argv[] = { "vi", file, NULL };
2920 const char *editor;
2922 editor = getenv("GIT_EDITOR");
2923 if (!editor && *opt_editor)
2924 editor = opt_editor;
2925 if (!editor)
2926 editor = getenv("VISUAL");
2927 if (!editor)
2928 editor = getenv("EDITOR");
2929 if (!editor)
2930 editor = "vi";
2932 editor_argv[0] = editor;
2933 open_external_viewer(editor_argv, from_root ? opt_cdup : NULL);
2934 }
2936 static void
2937 open_run_request(enum request request)
2938 {
2939 struct run_request *req = get_run_request(request);
2940 const char *argv[ARRAY_SIZE(req->argv)] = { NULL };
2942 if (!req) {
2943 report("Unknown run request");
2944 return;
2945 }
2947 if (format_argv(argv, req->argv, FORMAT_ALL))
2948 open_external_viewer(argv, NULL);
2949 free_argv(argv);
2950 }
2952 /*
2953 * User request switch noodle
2954 */
2956 static int
2957 view_driver(struct view *view, enum request request)
2958 {
2959 int i;
2961 if (request == REQ_NONE) {
2962 doupdate();
2963 return TRUE;
2964 }
2966 if (request > REQ_NONE) {
2967 open_run_request(request);
2968 /* FIXME: When all views can refresh always do this. */
2969 if (view == VIEW(REQ_VIEW_STATUS) ||
2970 view == VIEW(REQ_VIEW_MAIN) ||
2971 view == VIEW(REQ_VIEW_LOG) ||
2972 view == VIEW(REQ_VIEW_STAGE))
2973 request = REQ_REFRESH;
2974 else
2975 return TRUE;
2976 }
2978 if (view && view->lines) {
2979 request = view->ops->request(view, request, &view->line[view->lineno]);
2980 if (request == REQ_NONE)
2981 return TRUE;
2982 }
2984 switch (request) {
2985 case REQ_MOVE_UP:
2986 case REQ_MOVE_DOWN:
2987 case REQ_MOVE_PAGE_UP:
2988 case REQ_MOVE_PAGE_DOWN:
2989 case REQ_MOVE_FIRST_LINE:
2990 case REQ_MOVE_LAST_LINE:
2991 move_view(view, request);
2992 break;
2994 case REQ_SCROLL_LINE_DOWN:
2995 case REQ_SCROLL_LINE_UP:
2996 case REQ_SCROLL_PAGE_DOWN:
2997 case REQ_SCROLL_PAGE_UP:
2998 scroll_view(view, request);
2999 break;
3001 case REQ_VIEW_BLAME:
3002 if (!opt_file[0]) {
3003 report("No file chosen, press %s to open tree view",
3004 get_key(REQ_VIEW_TREE));
3005 break;
3006 }
3007 open_view(view, request, OPEN_DEFAULT);
3008 break;
3010 case REQ_VIEW_BLOB:
3011 if (!ref_blob[0]) {
3012 report("No file chosen, press %s to open tree view",
3013 get_key(REQ_VIEW_TREE));
3014 break;
3015 }
3016 open_view(view, request, OPEN_DEFAULT);
3017 break;
3019 case REQ_VIEW_PAGER:
3020 if (!VIEW(REQ_VIEW_PAGER)->pipe && !VIEW(REQ_VIEW_PAGER)->lines) {
3021 report("No pager content, press %s to run command from prompt",
3022 get_key(REQ_PROMPT));
3023 break;
3024 }
3025 open_view(view, request, OPEN_DEFAULT);
3026 break;
3028 case REQ_VIEW_STAGE:
3029 if (!VIEW(REQ_VIEW_STAGE)->lines) {
3030 report("No stage content, press %s to open the status view and choose file",
3031 get_key(REQ_VIEW_STATUS));
3032 break;
3033 }
3034 open_view(view, request, OPEN_DEFAULT);
3035 break;
3037 case REQ_VIEW_STATUS:
3038 if (opt_is_inside_work_tree == FALSE) {
3039 report("The status view requires a working tree");
3040 break;
3041 }
3042 open_view(view, request, OPEN_DEFAULT);
3043 break;
3045 case REQ_VIEW_MAIN:
3046 case REQ_VIEW_DIFF:
3047 case REQ_VIEW_LOG:
3048 case REQ_VIEW_TREE:
3049 case REQ_VIEW_HELP:
3050 open_view(view, request, OPEN_DEFAULT);
3051 break;
3053 case REQ_NEXT:
3054 case REQ_PREVIOUS:
3055 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
3057 if ((view == VIEW(REQ_VIEW_DIFF) &&
3058 view->parent == VIEW(REQ_VIEW_MAIN)) ||
3059 (view == VIEW(REQ_VIEW_DIFF) &&
3060 view->parent == VIEW(REQ_VIEW_BLAME)) ||
3061 (view == VIEW(REQ_VIEW_STAGE) &&
3062 view->parent == VIEW(REQ_VIEW_STATUS)) ||
3063 (view == VIEW(REQ_VIEW_BLOB) &&
3064 view->parent == VIEW(REQ_VIEW_TREE))) {
3065 int line;
3067 view = view->parent;
3068 line = view->lineno;
3069 move_view(view, request);
3070 if (view_is_displayed(view))
3071 update_view_title(view);
3072 if (line != view->lineno)
3073 view->ops->request(view, REQ_ENTER,
3074 &view->line[view->lineno]);
3076 } else {
3077 move_view(view, request);
3078 }
3079 break;
3081 case REQ_VIEW_NEXT:
3082 {
3083 int nviews = displayed_views();
3084 int next_view = (current_view + 1) % nviews;
3086 if (next_view == current_view) {
3087 report("Only one view is displayed");
3088 break;
3089 }
3091 current_view = next_view;
3092 /* Blur out the title of the previous view. */
3093 update_view_title(view);
3094 report("");
3095 break;
3096 }
3097 case REQ_REFRESH:
3098 report("Refreshing is not yet supported for the %s view", view->name);
3099 break;
3101 case REQ_MAXIMIZE:
3102 if (displayed_views() == 2)
3103 open_view(view, VIEW_REQ(view), OPEN_DEFAULT);
3104 break;
3106 case REQ_TOGGLE_LINENO:
3107 opt_line_number = !opt_line_number;
3108 redraw_display();
3109 break;
3111 case REQ_TOGGLE_DATE:
3112 opt_date = !opt_date;
3113 redraw_display();
3114 break;
3116 case REQ_TOGGLE_AUTHOR:
3117 opt_author = !opt_author;
3118 redraw_display();
3119 break;
3121 case REQ_TOGGLE_REV_GRAPH:
3122 opt_rev_graph = !opt_rev_graph;
3123 redraw_display();
3124 break;
3126 case REQ_TOGGLE_REFS:
3127 opt_show_refs = !opt_show_refs;
3128 redraw_display();
3129 break;
3131 case REQ_SEARCH:
3132 case REQ_SEARCH_BACK:
3133 search_view(view, request);
3134 break;
3136 case REQ_FIND_NEXT:
3137 case REQ_FIND_PREV:
3138 find_next(view, request);
3139 break;
3141 case REQ_STOP_LOADING:
3142 for (i = 0; i < ARRAY_SIZE(views); i++) {
3143 view = &views[i];
3144 if (view->pipe)
3145 report("Stopped loading the %s view", view->name),
3146 end_update(view, TRUE);
3147 }
3148 break;
3150 case REQ_SHOW_VERSION:
3151 report("tig-%s (built %s)", TIG_VERSION, __DATE__);
3152 return TRUE;
3154 case REQ_SCREEN_RESIZE:
3155 resize_display();
3156 /* Fall-through */
3157 case REQ_SCREEN_REDRAW:
3158 redraw_display();
3159 break;
3161 case REQ_EDIT:
3162 report("Nothing to edit");
3163 break;
3165 case REQ_ENTER:
3166 report("Nothing to enter");
3167 break;
3169 case REQ_VIEW_CLOSE:
3170 /* XXX: Mark closed views by letting view->parent point to the
3171 * view itself. Parents to closed view should never be
3172 * followed. */
3173 if (view->parent &&
3174 view->parent->parent != view->parent) {
3175 memset(display, 0, sizeof(display));
3176 current_view = 0;
3177 display[current_view] = view->parent;
3178 view->parent = view;
3179 resize_display();
3180 redraw_display();
3181 report("");
3182 break;
3183 }
3184 /* Fall-through */
3185 case REQ_QUIT:
3186 return FALSE;
3188 default:
3189 report("Unknown key, press 'h' for help");
3190 return TRUE;
3191 }
3193 return TRUE;
3194 }
3197 /*
3198 * Pager backend
3199 */
3201 static bool
3202 pager_draw(struct view *view, struct line *line, unsigned int lineno)
3203 {
3204 char *text = line->data;
3206 if (opt_line_number && draw_lineno(view, lineno))
3207 return TRUE;
3209 draw_text(view, line->type, text, TRUE);
3210 return TRUE;
3211 }
3213 static bool
3214 add_describe_ref(char *buf, size_t *bufpos, const char *commit_id, const char *sep)
3215 {
3216 const char *describe_argv[] = { "git", "describe", commit_id, NULL };
3217 char refbuf[SIZEOF_STR];
3218 char *ref = NULL;
3220 if (run_io_buf(describe_argv, refbuf, sizeof(refbuf)))
3221 ref = chomp_string(refbuf);
3223 if (!ref || !*ref)
3224 return TRUE;
3226 /* This is the only fatal call, since it can "corrupt" the buffer. */
3227 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
3228 return FALSE;
3230 return TRUE;
3231 }
3233 static void
3234 add_pager_refs(struct view *view, struct line *line)
3235 {
3236 char buf[SIZEOF_STR];
3237 char *commit_id = (char *)line->data + STRING_SIZE("commit ");
3238 struct ref **refs;
3239 size_t bufpos = 0, refpos = 0;
3240 const char *sep = "Refs: ";
3241 bool is_tag = FALSE;
3243 assert(line->type == LINE_COMMIT);
3245 refs = get_refs(commit_id);
3246 if (!refs) {
3247 if (view == VIEW(REQ_VIEW_DIFF))
3248 goto try_add_describe_ref;
3249 return;
3250 }
3252 do {
3253 struct ref *ref = refs[refpos];
3254 const char *fmt = ref->tag ? "%s[%s]" :
3255 ref->remote ? "%s<%s>" : "%s%s";
3257 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
3258 return;
3259 sep = ", ";
3260 if (ref->tag)
3261 is_tag = TRUE;
3262 } while (refs[refpos++]->next);
3264 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
3265 try_add_describe_ref:
3266 /* Add <tag>-g<commit_id> "fake" reference. */
3267 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
3268 return;
3269 }
3271 if (bufpos == 0)
3272 return;
3274 if (!realloc_lines(view, view->line_size + 1))
3275 return;
3277 add_line_text(view, buf, LINE_PP_REFS);
3278 }
3280 static bool
3281 pager_read(struct view *view, char *data)
3282 {
3283 struct line *line;
3285 if (!data)
3286 return TRUE;
3288 line = add_line_text(view, data, get_line_type(data));
3289 if (!line)
3290 return FALSE;
3292 if (line->type == LINE_COMMIT &&
3293 (view == VIEW(REQ_VIEW_DIFF) ||
3294 view == VIEW(REQ_VIEW_LOG)))
3295 add_pager_refs(view, line);
3297 return TRUE;
3298 }
3300 static enum request
3301 pager_request(struct view *view, enum request request, struct line *line)
3302 {
3303 int split = 0;
3305 if (request != REQ_ENTER)
3306 return request;
3308 if (line->type == LINE_COMMIT &&
3309 (view == VIEW(REQ_VIEW_LOG) ||
3310 view == VIEW(REQ_VIEW_PAGER))) {
3311 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
3312 split = 1;
3313 }
3315 /* Always scroll the view even if it was split. That way
3316 * you can use Enter to scroll through the log view and
3317 * split open each commit diff. */
3318 scroll_view(view, REQ_SCROLL_LINE_DOWN);
3320 /* FIXME: A minor workaround. Scrolling the view will call report("")
3321 * but if we are scrolling a non-current view this won't properly
3322 * update the view title. */
3323 if (split)
3324 update_view_title(view);
3326 return REQ_NONE;
3327 }
3329 static bool
3330 pager_grep(struct view *view, struct line *line)
3331 {
3332 regmatch_t pmatch;
3333 char *text = line->data;
3335 if (!*text)
3336 return FALSE;
3338 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
3339 return FALSE;
3341 return TRUE;
3342 }
3344 static void
3345 pager_select(struct view *view, struct line *line)
3346 {
3347 if (line->type == LINE_COMMIT) {
3348 char *text = (char *)line->data + STRING_SIZE("commit ");
3350 if (view != VIEW(REQ_VIEW_PAGER))
3351 string_copy_rev(view->ref, text);
3352 string_copy_rev(ref_commit, text);
3353 }
3354 }
3356 static struct view_ops pager_ops = {
3357 "line",
3358 NULL,
3359 NULL,
3360 pager_read,
3361 pager_draw,
3362 pager_request,
3363 pager_grep,
3364 pager_select,
3365 };
3367 static const char *log_argv[SIZEOF_ARG] = {
3368 "git", "log", "--no-color", "--cc", "--stat", "-n100", "%(head)", NULL
3369 };
3371 static enum request
3372 log_request(struct view *view, enum request request, struct line *line)
3373 {
3374 switch (request) {
3375 case REQ_REFRESH:
3376 load_refs();
3377 open_view(view, REQ_VIEW_LOG, OPEN_REFRESH);
3378 return REQ_NONE;
3379 default:
3380 return pager_request(view, request, line);
3381 }
3382 }
3384 static struct view_ops log_ops = {
3385 "line",
3386 log_argv,
3387 NULL,
3388 pager_read,
3389 pager_draw,
3390 log_request,
3391 pager_grep,
3392 pager_select,
3393 };
3395 static const char *diff_argv[SIZEOF_ARG] = {
3396 "git", "show", "--pretty=fuller", "--no-color", "--root",
3397 "--patch-with-stat", "--find-copies-harder", "-C", "%(commit)", NULL
3398 };
3400 static struct view_ops diff_ops = {
3401 "line",
3402 diff_argv,
3403 NULL,
3404 pager_read,
3405 pager_draw,
3406 pager_request,
3407 pager_grep,
3408 pager_select,
3409 };
3411 /*
3412 * Help backend
3413 */
3415 static bool
3416 help_open(struct view *view)
3417 {
3418 char buf[BUFSIZ];
3419 int lines = ARRAY_SIZE(req_info) + 2;
3420 int i;
3422 if (view->lines > 0)
3423 return TRUE;
3425 for (i = 0; i < ARRAY_SIZE(req_info); i++)
3426 if (!req_info[i].request)
3427 lines++;
3429 lines += run_requests + 1;
3431 view->line = calloc(lines, sizeof(*view->line));
3432 if (!view->line)
3433 return FALSE;
3435 add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
3437 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
3438 const char *key;
3440 if (req_info[i].request == REQ_NONE)
3441 continue;
3443 if (!req_info[i].request) {
3444 add_line_text(view, "", LINE_DEFAULT);
3445 add_line_text(view, req_info[i].help, LINE_DEFAULT);
3446 continue;
3447 }
3449 key = get_key(req_info[i].request);
3450 if (!*key)
3451 key = "(no key defined)";
3453 if (!string_format(buf, " %-25s %s", key, req_info[i].help))
3454 continue;
3456 add_line_text(view, buf, LINE_DEFAULT);
3457 }
3459 if (run_requests) {
3460 add_line_text(view, "", LINE_DEFAULT);
3461 add_line_text(view, "External commands:", LINE_DEFAULT);
3462 }
3464 for (i = 0; i < run_requests; i++) {
3465 struct run_request *req = get_run_request(REQ_NONE + i + 1);
3466 const char *key;
3467 char cmd[SIZEOF_STR];
3468 size_t bufpos;
3469 int argc;
3471 if (!req)
3472 continue;
3474 key = get_key_name(req->key);
3475 if (!*key)
3476 key = "(no key defined)";
3478 for (bufpos = 0, argc = 0; req->argv[argc]; argc++)
3479 if (!string_format_from(cmd, &bufpos, "%s%s",
3480 argc ? " " : "", req->argv[argc]))
3481 return REQ_NONE;
3483 if (!string_format(buf, " %-10s %-14s `%s`",
3484 keymap_table[req->keymap].name, key, cmd))
3485 continue;
3487 add_line_text(view, buf, LINE_DEFAULT);
3488 }
3490 return TRUE;
3491 }
3493 static struct view_ops help_ops = {
3494 "line",
3495 NULL,
3496 help_open,
3497 NULL,
3498 pager_draw,
3499 pager_request,
3500 pager_grep,
3501 pager_select,
3502 };
3505 /*
3506 * Tree backend
3507 */
3509 struct tree_stack_entry {
3510 struct tree_stack_entry *prev; /* Entry below this in the stack */
3511 unsigned long lineno; /* Line number to restore */
3512 char *name; /* Position of name in opt_path */
3513 };
3515 /* The top of the path stack. */
3516 static struct tree_stack_entry *tree_stack = NULL;
3517 unsigned long tree_lineno = 0;
3519 static void
3520 pop_tree_stack_entry(void)
3521 {
3522 struct tree_stack_entry *entry = tree_stack;
3524 tree_lineno = entry->lineno;
3525 entry->name[0] = 0;
3526 tree_stack = entry->prev;
3527 free(entry);
3528 }
3530 static void
3531 push_tree_stack_entry(const char *name, unsigned long lineno)
3532 {
3533 struct tree_stack_entry *entry = calloc(1, sizeof(*entry));
3534 size_t pathlen = strlen(opt_path);
3536 if (!entry)
3537 return;
3539 entry->prev = tree_stack;
3540 entry->name = opt_path + pathlen;
3541 tree_stack = entry;
3543 if (!string_format_from(opt_path, &pathlen, "%s/", name)) {
3544 pop_tree_stack_entry();
3545 return;
3546 }
3548 /* Move the current line to the first tree entry. */
3549 tree_lineno = 1;
3550 entry->lineno = lineno;
3551 }
3553 /* Parse output from git-ls-tree(1):
3554 *
3555 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
3556 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
3557 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
3558 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
3559 */
3561 #define SIZEOF_TREE_ATTR \
3562 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
3564 #define TREE_UP_FORMAT "040000 tree %s\t.."
3566 static int
3567 tree_compare_entry(enum line_type type1, const char *name1,
3568 enum line_type type2, const char *name2)
3569 {
3570 if (type1 != type2) {
3571 if (type1 == LINE_TREE_DIR)
3572 return -1;
3573 return 1;
3574 }
3576 return strcmp(name1, name2);
3577 }
3579 static const char *
3580 tree_path(struct line *line)
3581 {
3582 const char *path = line->data;
3584 return path + SIZEOF_TREE_ATTR;
3585 }
3587 static bool
3588 tree_read(struct view *view, char *text)
3589 {
3590 size_t textlen = text ? strlen(text) : 0;
3591 char buf[SIZEOF_STR];
3592 unsigned long pos;
3593 enum line_type type;
3594 bool first_read = view->lines == 0;
3596 if (!text)
3597 return TRUE;
3598 if (textlen <= SIZEOF_TREE_ATTR)
3599 return FALSE;
3601 type = text[STRING_SIZE("100644 ")] == 't'
3602 ? LINE_TREE_DIR : LINE_TREE_FILE;
3604 if (first_read) {
3605 /* Add path info line */
3606 if (!string_format(buf, "Directory path /%s", opt_path) ||
3607 !realloc_lines(view, view->line_size + 1) ||
3608 !add_line_text(view, buf, LINE_DEFAULT))
3609 return FALSE;
3611 /* Insert "link" to parent directory. */
3612 if (*opt_path) {
3613 if (!string_format(buf, TREE_UP_FORMAT, view->ref) ||
3614 !realloc_lines(view, view->line_size + 1) ||
3615 !add_line_text(view, buf, LINE_TREE_DIR))
3616 return FALSE;
3617 }
3618 }
3620 /* Strip the path part ... */
3621 if (*opt_path) {
3622 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
3623 size_t striplen = strlen(opt_path);
3624 char *path = text + SIZEOF_TREE_ATTR;
3626 if (pathlen > striplen)
3627 memmove(path, path + striplen,
3628 pathlen - striplen + 1);
3629 }
3631 /* Skip "Directory ..." and ".." line. */
3632 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
3633 struct line *line = &view->line[pos];
3634 const char *path1 = tree_path(line);
3635 char *path2 = text + SIZEOF_TREE_ATTR;
3636 int cmp = tree_compare_entry(line->type, path1, type, path2);
3638 if (cmp <= 0)
3639 continue;
3641 text = strdup(text);
3642 if (!text)
3643 return FALSE;
3645 if (view->lines > pos)
3646 memmove(&view->line[pos + 1], &view->line[pos],
3647 (view->lines - pos) * sizeof(*line));
3649 line = &view->line[pos];
3650 line->data = text;
3651 line->type = type;
3652 view->lines++;
3653 return TRUE;
3654 }
3656 if (!add_line_text(view, text, type))
3657 return FALSE;
3659 if (tree_lineno > view->lineno) {
3660 view->lineno = tree_lineno;
3661 tree_lineno = 0;
3662 }
3664 return TRUE;
3665 }
3667 static enum request
3668 tree_request(struct view *view, enum request request, struct line *line)
3669 {
3670 enum open_flags flags;
3672 switch (request) {
3673 case REQ_VIEW_BLAME:
3674 if (line->type != LINE_TREE_FILE) {
3675 report("Blame only supported for files");
3676 return REQ_NONE;
3677 }
3679 string_copy(opt_ref, view->vid);
3680 return request;
3682 case REQ_EDIT:
3683 if (line->type != LINE_TREE_FILE) {
3684 report("Edit only supported for files");
3685 } else if (!is_head_commit(view->vid)) {
3686 report("Edit only supported for files in the current work tree");
3687 } else {
3688 open_editor(TRUE, opt_file);
3689 }
3690 return REQ_NONE;
3692 case REQ_TREE_PARENT:
3693 if (!*opt_path) {
3694 /* quit view if at top of tree */
3695 return REQ_VIEW_CLOSE;
3696 }
3697 /* fake 'cd ..' */
3698 line = &view->line[1];
3699 break;
3701 case REQ_ENTER:
3702 break;
3704 default:
3705 return request;
3706 }
3708 /* Cleanup the stack if the tree view is at a different tree. */
3709 while (!*opt_path && tree_stack)
3710 pop_tree_stack_entry();
3712 switch (line->type) {
3713 case LINE_TREE_DIR:
3714 /* Depending on whether it is a subdir or parent (updir?) link
3715 * mangle the path buffer. */
3716 if (line == &view->line[1] && *opt_path) {
3717 pop_tree_stack_entry();
3719 } else {
3720 const char *basename = tree_path(line);
3722 push_tree_stack_entry(basename, view->lineno);
3723 }
3725 /* Trees and subtrees share the same ID, so they are not not
3726 * unique like blobs. */
3727 flags = OPEN_RELOAD;
3728 request = REQ_VIEW_TREE;
3729 break;
3731 case LINE_TREE_FILE:
3732 flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
3733 request = REQ_VIEW_BLOB;
3734 break;
3736 default:
3737 return TRUE;
3738 }
3740 open_view(view, request, flags);
3741 if (request == REQ_VIEW_TREE) {
3742 view->lineno = tree_lineno;
3743 }
3745 return REQ_NONE;
3746 }
3748 static void
3749 tree_select(struct view *view, struct line *line)
3750 {
3751 char *text = (char *)line->data + STRING_SIZE("100644 blob ");
3753 if (line->type == LINE_TREE_FILE) {
3754 string_copy_rev(ref_blob, text);
3755 string_format(opt_file, "%s%s", opt_path, tree_path(line));
3757 } else if (line->type != LINE_TREE_DIR) {
3758 return;
3759 }
3761 string_copy_rev(view->ref, text);
3762 }
3764 static const char *tree_argv[SIZEOF_ARG] = {
3765 "git", "ls-tree", "%(commit)", "%(directory)", NULL
3766 };
3768 static struct view_ops tree_ops = {
3769 "file",
3770 tree_argv,
3771 NULL,
3772 tree_read,
3773 pager_draw,
3774 tree_request,
3775 pager_grep,
3776 tree_select,
3777 };
3779 static bool
3780 blob_read(struct view *view, char *line)
3781 {
3782 if (!line)
3783 return TRUE;
3784 return add_line_text(view, line, LINE_DEFAULT) != NULL;
3785 }
3787 static const char *blob_argv[SIZEOF_ARG] = {
3788 "git", "cat-file", "blob", "%(blob)", NULL
3789 };
3791 static struct view_ops blob_ops = {
3792 "line",
3793 blob_argv,
3794 NULL,
3795 blob_read,
3796 pager_draw,
3797 pager_request,
3798 pager_grep,
3799 pager_select,
3800 };
3802 /*
3803 * Blame backend
3804 *
3805 * Loading the blame view is a two phase job:
3806 *
3807 * 1. File content is read either using opt_file from the
3808 * filesystem or using git-cat-file.
3809 * 2. Then blame information is incrementally added by
3810 * reading output from git-blame.
3811 */
3813 static const char *blame_head_argv[] = {
3814 "git", "blame", "--incremental", "--", "%(file)", NULL
3815 };
3817 static const char *blame_ref_argv[] = {
3818 "git", "blame", "--incremental", "%(ref)", "--", "%(file)", NULL
3819 };
3821 static const char *blame_cat_file_argv[] = {
3822 "git", "cat-file", "blob", "%(ref):%(file)", NULL
3823 };
3825 struct blame_commit {
3826 char id[SIZEOF_REV]; /* SHA1 ID. */
3827 char title[128]; /* First line of the commit message. */
3828 char author[75]; /* Author of the commit. */
3829 struct tm time; /* Date from the author ident. */
3830 char filename[128]; /* Name of file. */
3831 };
3833 struct blame {
3834 struct blame_commit *commit;
3835 char text[1];
3836 };
3838 static bool
3839 blame_open(struct view *view)
3840 {
3841 if (*opt_ref || !io_open(&view->io, opt_file)) {
3842 if (!run_io_rd(&view->io, blame_cat_file_argv, FORMAT_ALL))
3843 return FALSE;
3844 }
3846 setup_update(view, opt_file);
3847 string_format(view->ref, "%s ...", opt_file);
3849 return TRUE;
3850 }
3852 static struct blame_commit *
3853 get_blame_commit(struct view *view, const char *id)
3854 {
3855 size_t i;
3857 for (i = 0; i < view->lines; i++) {
3858 struct blame *blame = view->line[i].data;
3860 if (!blame->commit)
3861 continue;
3863 if (!strncmp(blame->commit->id, id, SIZEOF_REV - 1))
3864 return blame->commit;
3865 }
3867 {
3868 struct blame_commit *commit = calloc(1, sizeof(*commit));
3870 if (commit)
3871 string_ncopy(commit->id, id, SIZEOF_REV);
3872 return commit;
3873 }
3874 }
3876 static bool
3877 parse_number(const char **posref, size_t *number, size_t min, size_t max)
3878 {
3879 const char *pos = *posref;
3881 *posref = NULL;
3882 pos = strchr(pos + 1, ' ');
3883 if (!pos || !isdigit(pos[1]))
3884 return FALSE;
3885 *number = atoi(pos + 1);
3886 if (*number < min || *number > max)
3887 return FALSE;
3889 *posref = pos;
3890 return TRUE;
3891 }
3893 static struct blame_commit *
3894 parse_blame_commit(struct view *view, const char *text, int *blamed)
3895 {
3896 struct blame_commit *commit;
3897 struct blame *blame;
3898 const char *pos = text + SIZEOF_REV - 1;
3899 size_t lineno;
3900 size_t group;
3902 if (strlen(text) <= SIZEOF_REV || *pos != ' ')
3903 return NULL;
3905 if (!parse_number(&pos, &lineno, 1, view->lines) ||
3906 !parse_number(&pos, &group, 1, view->lines - lineno + 1))
3907 return NULL;
3909 commit = get_blame_commit(view, text);
3910 if (!commit)
3911 return NULL;
3913 *blamed += group;
3914 while (group--) {
3915 struct line *line = &view->line[lineno + group - 1];
3917 blame = line->data;
3918 blame->commit = commit;
3919 line->dirty = 1;
3920 }
3922 return commit;
3923 }
3925 static bool
3926 blame_read_file(struct view *view, const char *line, bool *read_file)
3927 {
3928 if (!line) {
3929 const char **argv = *opt_ref ? blame_ref_argv : blame_head_argv;
3930 struct io io = {};
3932 if (view->lines == 0 && !view->parent)
3933 die("No blame exist for %s", view->vid);
3935 if (view->lines == 0 || !run_io_rd(&io, argv, FORMAT_ALL)) {
3936 report("Failed to load blame data");
3937 return TRUE;
3938 }
3940 done_io(view->pipe);
3941 view->io = io;
3942 *read_file = FALSE;
3943 return FALSE;
3945 } else {
3946 size_t linelen = strlen(line);
3947 struct blame *blame = malloc(sizeof(*blame) + linelen);
3949 blame->commit = NULL;
3950 strncpy(blame->text, line, linelen);
3951 blame->text[linelen] = 0;
3952 return add_line_data(view, blame, LINE_BLAME_ID) != NULL;
3953 }
3954 }
3956 static bool
3957 match_blame_header(const char *name, char **line)
3958 {
3959 size_t namelen = strlen(name);
3960 bool matched = !strncmp(name, *line, namelen);
3962 if (matched)
3963 *line += namelen;
3965 return matched;
3966 }
3968 static bool
3969 blame_read(struct view *view, char *line)
3970 {
3971 static struct blame_commit *commit = NULL;
3972 static int blamed = 0;
3973 static time_t author_time;
3974 static bool read_file = TRUE;
3976 if (read_file)
3977 return blame_read_file(view, line, &read_file);
3979 if (!line) {
3980 /* Reset all! */
3981 commit = NULL;
3982 blamed = 0;
3983 read_file = TRUE;
3984 string_format(view->ref, "%s", view->vid);
3985 if (view_is_displayed(view)) {
3986 update_view_title(view);
3987 redraw_view_from(view, 0);
3988 }
3989 return TRUE;
3990 }
3992 if (!commit) {
3993 commit = parse_blame_commit(view, line, &blamed);
3994 string_format(view->ref, "%s %2d%%", view->vid,
3995 blamed * 100 / view->lines);
3997 } else if (match_blame_header("author ", &line)) {
3998 string_ncopy(commit->author, line, strlen(line));
4000 } else if (match_blame_header("author-time ", &line)) {
4001 author_time = (time_t) atol(line);
4003 } else if (match_blame_header("author-tz ", &line)) {
4004 long tz;
4006 tz = ('0' - line[1]) * 60 * 60 * 10;
4007 tz += ('0' - line[2]) * 60 * 60;
4008 tz += ('0' - line[3]) * 60;
4009 tz += ('0' - line[4]) * 60;
4011 if (line[0] == '-')
4012 tz = -tz;
4014 author_time -= tz;
4015 gmtime_r(&author_time, &commit->time);
4017 } else if (match_blame_header("summary ", &line)) {
4018 string_ncopy(commit->title, line, strlen(line));
4020 } else if (match_blame_header("filename ", &line)) {
4021 string_ncopy(commit->filename, line, strlen(line));
4022 commit = NULL;
4023 }
4025 return TRUE;
4026 }
4028 static bool
4029 blame_draw(struct view *view, struct line *line, unsigned int lineno)
4030 {
4031 struct blame *blame = line->data;
4032 struct tm *time = NULL;
4033 const char *id = NULL, *author = NULL;
4035 if (blame->commit && *blame->commit->filename) {
4036 id = blame->commit->id;
4037 author = blame->commit->author;
4038 time = &blame->commit->time;
4039 }
4041 if (opt_date && draw_date(view, time))
4042 return TRUE;
4044 if (opt_author &&
4045 draw_field(view, LINE_MAIN_AUTHOR, author, opt_author_cols, TRUE))
4046 return TRUE;
4048 if (draw_field(view, LINE_BLAME_ID, id, ID_COLS, FALSE))
4049 return TRUE;
4051 if (draw_lineno(view, lineno))
4052 return TRUE;
4054 draw_text(view, LINE_DEFAULT, blame->text, TRUE);
4055 return TRUE;
4056 }
4058 static enum request
4059 blame_request(struct view *view, enum request request, struct line *line)
4060 {
4061 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
4062 struct blame *blame = line->data;
4064 switch (request) {
4065 case REQ_VIEW_BLAME:
4066 if (!blame->commit || !strcmp(blame->commit->id, NULL_ID)) {
4067 report("Commit ID unknown");
4068 break;
4069 }
4070 string_copy(opt_ref, blame->commit->id);
4071 open_view(view, REQ_VIEW_BLAME, OPEN_REFRESH);
4072 return request;
4074 case REQ_ENTER:
4075 if (!blame->commit) {
4076 report("No commit loaded yet");
4077 break;
4078 }
4080 if (view_is_displayed(VIEW(REQ_VIEW_DIFF)) &&
4081 !strcmp(blame->commit->id, VIEW(REQ_VIEW_DIFF)->ref))
4082 break;
4084 if (!strcmp(blame->commit->id, NULL_ID)) {
4085 struct view *diff = VIEW(REQ_VIEW_DIFF);
4086 const char *diff_index_argv[] = {
4087 "git", "diff-index", "--root", "--cached",
4088 "--patch-with-stat", "-C", "-M",
4089 "HEAD", "--", view->vid, NULL
4090 };
4092 if (!prepare_update(diff, diff_index_argv, NULL, FORMAT_DASH)) {
4093 report("Failed to allocate diff command");
4094 break;
4095 }
4096 flags |= OPEN_PREPARED;
4097 }
4099 open_view(view, REQ_VIEW_DIFF, flags);
4100 break;
4102 default:
4103 return request;
4104 }
4106 return REQ_NONE;
4107 }
4109 static bool
4110 blame_grep(struct view *view, struct line *line)
4111 {
4112 struct blame *blame = line->data;
4113 struct blame_commit *commit = blame->commit;
4114 regmatch_t pmatch;
4116 #define MATCH(text, on) \
4117 (on && *text && regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
4119 if (commit) {
4120 char buf[DATE_COLS + 1];
4122 if (MATCH(commit->title, 1) ||
4123 MATCH(commit->author, opt_author) ||
4124 MATCH(commit->id, opt_date))
4125 return TRUE;
4127 if (strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time) &&
4128 MATCH(buf, 1))
4129 return TRUE;
4130 }
4132 return MATCH(blame->text, 1);
4134 #undef MATCH
4135 }
4137 static void
4138 blame_select(struct view *view, struct line *line)
4139 {
4140 struct blame *blame = line->data;
4141 struct blame_commit *commit = blame->commit;
4143 if (!commit)
4144 return;
4146 if (!strcmp(commit->id, NULL_ID))
4147 string_ncopy(ref_commit, "HEAD", 4);
4148 else
4149 string_copy_rev(ref_commit, commit->id);
4150 }
4152 static struct view_ops blame_ops = {
4153 "line",
4154 NULL,
4155 blame_open,
4156 blame_read,
4157 blame_draw,
4158 blame_request,
4159 blame_grep,
4160 blame_select,
4161 };
4163 /*
4164 * Status backend
4165 */
4167 struct status {
4168 char status;
4169 struct {
4170 mode_t mode;
4171 char rev[SIZEOF_REV];
4172 char name[SIZEOF_STR];
4173 } old;
4174 struct {
4175 mode_t mode;
4176 char rev[SIZEOF_REV];
4177 char name[SIZEOF_STR];
4178 } new;
4179 };
4181 static char status_onbranch[SIZEOF_STR];
4182 static struct status stage_status;
4183 static enum line_type stage_line_type;
4184 static size_t stage_chunks;
4185 static int *stage_chunk;
4187 /* This should work even for the "On branch" line. */
4188 static inline bool
4189 status_has_none(struct view *view, struct line *line)
4190 {
4191 return line < view->line + view->lines && !line[1].data;
4192 }
4194 /* Get fields from the diff line:
4195 * :100644 100644 06a5d6ae9eca55be2e0e585a152e6b1336f2b20e 0000000000000000000000000000000000000000 M
4196 */
4197 static inline bool
4198 status_get_diff(struct status *file, const char *buf, size_t bufsize)
4199 {
4200 const char *old_mode = buf + 1;
4201 const char *new_mode = buf + 8;
4202 const char *old_rev = buf + 15;
4203 const char *new_rev = buf + 56;
4204 const char *status = buf + 97;
4206 if (bufsize < 98 ||
4207 old_mode[-1] != ':' ||
4208 new_mode[-1] != ' ' ||
4209 old_rev[-1] != ' ' ||
4210 new_rev[-1] != ' ' ||
4211 status[-1] != ' ')
4212 return FALSE;
4214 file->status = *status;
4216 string_copy_rev(file->old.rev, old_rev);
4217 string_copy_rev(file->new.rev, new_rev);
4219 file->old.mode = strtoul(old_mode, NULL, 8);
4220 file->new.mode = strtoul(new_mode, NULL, 8);
4222 file->old.name[0] = file->new.name[0] = 0;
4224 return TRUE;
4225 }
4227 static bool
4228 status_run(struct view *view, const char *argv[], char status, enum line_type type)
4229 {
4230 struct status *file = NULL;
4231 struct status *unmerged = NULL;
4232 char *buf;
4233 struct io io = {};
4235 if (!run_io(&io, argv, NULL, IO_RD))
4236 return FALSE;
4238 add_line_data(view, NULL, type);
4240 while ((buf = io_get(&io, 0, TRUE))) {
4241 if (!file) {
4242 if (!realloc_lines(view, view->line_size + 1))
4243 goto error_out;
4245 file = calloc(1, sizeof(*file));
4246 if (!file)
4247 goto error_out;
4249 add_line_data(view, file, type);
4250 }
4252 /* Parse diff info part. */
4253 if (status) {
4254 file->status = status;
4255 if (status == 'A')
4256 string_copy(file->old.rev, NULL_ID);
4258 } else if (!file->status) {
4259 if (!status_get_diff(file, buf, strlen(buf)))
4260 goto error_out;
4262 buf = io_get(&io, 0, TRUE);
4263 if (!buf)
4264 break;
4266 /* Collapse all 'M'odified entries that follow a
4267 * associated 'U'nmerged entry. */
4268 if (file->status == 'U') {
4269 unmerged = file;
4271 } else if (unmerged) {
4272 int collapse = !strcmp(buf, unmerged->new.name);
4274 unmerged = NULL;
4275 if (collapse) {
4276 free(file);
4277 view->lines--;
4278 continue;
4279 }
4280 }
4281 }
4283 /* Grab the old name for rename/copy. */
4284 if (!*file->old.name &&
4285 (file->status == 'R' || file->status == 'C')) {
4286 string_ncopy(file->old.name, buf, strlen(buf));
4288 buf = io_get(&io, 0, TRUE);
4289 if (!buf)
4290 break;
4291 }
4293 /* git-ls-files just delivers a NUL separated list of
4294 * file names similar to the second half of the
4295 * git-diff-* output. */
4296 string_ncopy(file->new.name, buf, strlen(buf));
4297 if (!*file->old.name)
4298 string_copy(file->old.name, file->new.name);
4299 file = NULL;
4300 }
4302 if (io_error(&io)) {
4303 error_out:
4304 done_io(&io);
4305 return FALSE;
4306 }
4308 if (!view->line[view->lines - 1].data)
4309 add_line_data(view, NULL, LINE_STAT_NONE);
4311 done_io(&io);
4312 return TRUE;
4313 }
4315 /* Don't show unmerged entries in the staged section. */
4316 static const char *status_diff_index_argv[] = {
4317 "git", "diff-index", "-z", "--diff-filter=ACDMRTXB",
4318 "--cached", "-M", "HEAD", NULL
4319 };
4321 static const char *status_diff_files_argv[] = {
4322 "git", "diff-files", "-z", NULL
4323 };
4325 static const char *status_list_other_argv[] = {
4326 "git", "ls-files", "-z", "--others", "--exclude-standard", NULL
4327 };
4329 static const char *status_list_no_head_argv[] = {
4330 "git", "ls-files", "-z", "--cached", "--exclude-standard", NULL
4331 };
4333 static const char *update_index_argv[] = {
4334 "git", "update-index", "-q", "--unmerged", "--refresh", NULL
4335 };
4337 /* First parse staged info using git-diff-index(1), then parse unstaged
4338 * info using git-diff-files(1), and finally untracked files using
4339 * git-ls-files(1). */
4340 static bool
4341 status_open(struct view *view)
4342 {
4343 unsigned long prev_lineno = view->lineno;
4345 reset_view(view);
4347 if (!realloc_lines(view, view->line_size + 7))
4348 return FALSE;
4350 add_line_data(view, NULL, LINE_STAT_HEAD);
4351 if (is_initial_commit())
4352 string_copy(status_onbranch, "Initial commit");
4353 else if (!*opt_head)
4354 string_copy(status_onbranch, "Not currently on any branch");
4355 else if (!string_format(status_onbranch, "On branch %s", opt_head))
4356 return FALSE;
4358 run_io_bg(update_index_argv);
4360 if (is_initial_commit()) {
4361 if (!status_run(view, status_list_no_head_argv, 'A', LINE_STAT_STAGED))
4362 return FALSE;
4363 } else if (!status_run(view, status_diff_index_argv, 0, LINE_STAT_STAGED)) {
4364 return FALSE;
4365 }
4367 if (!status_run(view, status_diff_files_argv, 0, LINE_STAT_UNSTAGED) ||
4368 !status_run(view, status_list_other_argv, '?', LINE_STAT_UNTRACKED))
4369 return FALSE;
4371 /* If all went well restore the previous line number to stay in
4372 * the context or select a line with something that can be
4373 * updated. */
4374 if (prev_lineno >= view->lines)
4375 prev_lineno = view->lines - 1;
4376 while (prev_lineno < view->lines && !view->line[prev_lineno].data)
4377 prev_lineno++;
4378 while (prev_lineno > 0 && !view->line[prev_lineno].data)
4379 prev_lineno--;
4381 /* If the above fails, always skip the "On branch" line. */
4382 if (prev_lineno < view->lines)
4383 view->lineno = prev_lineno;
4384 else
4385 view->lineno = 1;
4387 if (view->lineno < view->offset)
4388 view->offset = view->lineno;
4389 else if (view->offset + view->height <= view->lineno)
4390 view->offset = view->lineno - view->height + 1;
4392 return TRUE;
4393 }
4395 static bool
4396 status_draw(struct view *view, struct line *line, unsigned int lineno)
4397 {
4398 struct status *status = line->data;
4399 enum line_type type;
4400 const char *text;
4402 if (!status) {
4403 switch (line->type) {
4404 case LINE_STAT_STAGED:
4405 type = LINE_STAT_SECTION;
4406 text = "Changes to be committed:";
4407 break;
4409 case LINE_STAT_UNSTAGED:
4410 type = LINE_STAT_SECTION;
4411 text = "Changed but not updated:";
4412 break;
4414 case LINE_STAT_UNTRACKED:
4415 type = LINE_STAT_SECTION;
4416 text = "Untracked files:";
4417 break;
4419 case LINE_STAT_NONE:
4420 type = LINE_DEFAULT;
4421 text = " (no files)";
4422 break;
4424 case LINE_STAT_HEAD:
4425 type = LINE_STAT_HEAD;
4426 text = status_onbranch;
4427 break;
4429 default:
4430 return FALSE;
4431 }
4432 } else {
4433 static char buf[] = { '?', ' ', ' ', ' ', 0 };
4435 buf[0] = status->status;
4436 if (draw_text(view, line->type, buf, TRUE))
4437 return TRUE;
4438 type = LINE_DEFAULT;
4439 text = status->new.name;
4440 }
4442 draw_text(view, type, text, TRUE);
4443 return TRUE;
4444 }
4446 static enum request
4447 status_enter(struct view *view, struct line *line)
4448 {
4449 struct status *status = line->data;
4450 const char *oldpath = status ? status->old.name : NULL;
4451 /* Diffs for unmerged entries are empty when passing the new
4452 * path, so leave it empty. */
4453 const char *newpath = status && status->status != 'U' ? status->new.name : NULL;
4454 const char *info;
4455 enum open_flags split;
4456 struct view *stage = VIEW(REQ_VIEW_STAGE);
4458 if (line->type == LINE_STAT_NONE ||
4459 (!status && line[1].type == LINE_STAT_NONE)) {
4460 report("No file to diff");
4461 return REQ_NONE;
4462 }
4464 switch (line->type) {
4465 case LINE_STAT_STAGED:
4466 if (is_initial_commit()) {
4467 const char *no_head_diff_argv[] = {
4468 "git", "diff", "--no-color", "--patch-with-stat",
4469 "--", "/dev/null", newpath, NULL
4470 };
4472 if (!prepare_update(stage, no_head_diff_argv, opt_cdup, FORMAT_DASH))
4473 return REQ_QUIT;
4474 } else {
4475 const char *index_show_argv[] = {
4476 "git", "diff-index", "--root", "--patch-with-stat",
4477 "-C", "-M", "--cached", "HEAD", "--",
4478 oldpath, newpath, NULL
4479 };
4481 if (!prepare_update(stage, index_show_argv, opt_cdup, FORMAT_DASH))
4482 return REQ_QUIT;
4483 }
4485 if (status)
4486 info = "Staged changes to %s";
4487 else
4488 info = "Staged changes";
4489 break;
4491 case LINE_STAT_UNSTAGED:
4492 {
4493 const char *files_show_argv[] = {
4494 "git", "diff-files", "--root", "--patch-with-stat",
4495 "-C", "-M", "--", oldpath, newpath, NULL
4496 };
4498 if (!prepare_update(stage, files_show_argv, opt_cdup, FORMAT_DASH))
4499 return REQ_QUIT;
4500 if (status)
4501 info = "Unstaged changes to %s";
4502 else
4503 info = "Unstaged changes";
4504 break;
4505 }
4506 case LINE_STAT_UNTRACKED:
4507 if (!newpath) {
4508 report("No file to show");
4509 return REQ_NONE;
4510 }
4512 if (!suffixcmp(status->new.name, -1, "/")) {
4513 report("Cannot display a directory");
4514 return REQ_NONE;
4515 }
4517 if (!prepare_update_file(stage, newpath))
4518 return REQ_QUIT;
4519 info = "Untracked file %s";
4520 break;
4522 case LINE_STAT_HEAD:
4523 return REQ_NONE;
4525 default:
4526 die("line type %d not handled in switch", line->type);
4527 }
4529 split = view_is_displayed(view) ? OPEN_SPLIT : 0;
4530 open_view(view, REQ_VIEW_STAGE, OPEN_REFRESH | split);
4531 if (view_is_displayed(VIEW(REQ_VIEW_STAGE))) {
4532 if (status) {
4533 stage_status = *status;
4534 } else {
4535 memset(&stage_status, 0, sizeof(stage_status));
4536 }
4538 stage_line_type = line->type;
4539 stage_chunks = 0;
4540 string_format(VIEW(REQ_VIEW_STAGE)->ref, info, stage_status.new.name);
4541 }
4543 return REQ_NONE;
4544 }
4546 static bool
4547 status_exists(struct status *status, enum line_type type)
4548 {
4549 struct view *view = VIEW(REQ_VIEW_STATUS);
4550 struct line *line;
4552 for (line = view->line; line < view->line + view->lines; line++) {
4553 struct status *pos = line->data;
4555 if (line->type == type && pos &&
4556 !strcmp(status->new.name, pos->new.name))
4557 return TRUE;
4558 }
4560 return FALSE;
4561 }
4564 static bool
4565 status_update_prepare(struct io *io, enum line_type type)
4566 {
4567 const char *staged_argv[] = {
4568 "git", "update-index", "-z", "--index-info", NULL
4569 };
4570 const char *others_argv[] = {
4571 "git", "update-index", "-z", "--add", "--remove", "--stdin", NULL
4572 };
4574 switch (type) {
4575 case LINE_STAT_STAGED:
4576 return run_io(io, staged_argv, opt_cdup, IO_WR);
4578 case LINE_STAT_UNSTAGED:
4579 return run_io(io, others_argv, opt_cdup, IO_WR);
4581 case LINE_STAT_UNTRACKED:
4582 return run_io(io, others_argv, NULL, IO_WR);
4584 default:
4585 die("line type %d not handled in switch", type);
4586 return FALSE;
4587 }
4588 }
4590 static bool
4591 status_update_write(struct io *io, struct status *status, enum line_type type)
4592 {
4593 char buf[SIZEOF_STR];
4594 size_t bufsize = 0;
4596 switch (type) {
4597 case LINE_STAT_STAGED:
4598 if (!string_format_from(buf, &bufsize, "%06o %s\t%s%c",
4599 status->old.mode,
4600 status->old.rev,
4601 status->old.name, 0))
4602 return FALSE;
4603 break;
4605 case LINE_STAT_UNSTAGED:
4606 case LINE_STAT_UNTRACKED:
4607 if (!string_format_from(buf, &bufsize, "%s%c", status->new.name, 0))
4608 return FALSE;
4609 break;
4611 default:
4612 die("line type %d not handled in switch", type);
4613 }
4615 return io_write(io, buf, bufsize);
4616 }
4618 static bool
4619 status_update_file(struct status *status, enum line_type type)
4620 {
4621 struct io io = {};
4622 bool result;
4624 if (!status_update_prepare(&io, type))
4625 return FALSE;
4627 result = status_update_write(&io, status, type);
4628 done_io(&io);
4629 return result;
4630 }
4632 static bool
4633 status_update_files(struct view *view, struct line *line)
4634 {
4635 struct io io = {};
4636 bool result = TRUE;
4637 struct line *pos = view->line + view->lines;
4638 int files = 0;
4639 int file, done;
4641 if (!status_update_prepare(&io, line->type))
4642 return FALSE;
4644 for (pos = line; pos < view->line + view->lines && pos->data; pos++)
4645 files++;
4647 for (file = 0, done = 0; result && file < files; line++, file++) {
4648 int almost_done = file * 100 / files;
4650 if (almost_done > done) {
4651 done = almost_done;
4652 string_format(view->ref, "updating file %u of %u (%d%% done)",
4653 file, files, done);
4654 update_view_title(view);
4655 }
4656 result = status_update_write(&io, line->data, line->type);
4657 }
4659 done_io(&io);
4660 return result;
4661 }
4663 static bool
4664 status_update(struct view *view)
4665 {
4666 struct line *line = &view->line[view->lineno];
4668 assert(view->lines);
4670 if (!line->data) {
4671 /* This should work even for the "On branch" line. */
4672 if (line < view->line + view->lines && !line[1].data) {
4673 report("Nothing to update");
4674 return FALSE;
4675 }
4677 if (!status_update_files(view, line + 1)) {
4678 report("Failed to update file status");
4679 return FALSE;
4680 }
4682 } else if (!status_update_file(line->data, line->type)) {
4683 report("Failed to update file status");
4684 return FALSE;
4685 }
4687 return TRUE;
4688 }
4690 static bool
4691 status_revert(struct status *status, enum line_type type, bool has_none)
4692 {
4693 if (!status || type != LINE_STAT_UNSTAGED) {
4694 if (type == LINE_STAT_STAGED) {
4695 report("Cannot revert changes to staged files");
4696 } else if (type == LINE_STAT_UNTRACKED) {
4697 report("Cannot revert changes to untracked files");
4698 } else if (has_none) {
4699 report("Nothing to revert");
4700 } else {
4701 report("Cannot revert changes to multiple files");
4702 }
4703 return FALSE;
4705 } else {
4706 const char *checkout_argv[] = {
4707 "git", "checkout", "--", status->old.name, NULL
4708 };
4710 if (!prompt_yesno("Are you sure you want to overwrite any changes?"))
4711 return FALSE;
4712 return run_io_fg(checkout_argv, opt_cdup);
4713 }
4714 }
4716 static enum request
4717 status_request(struct view *view, enum request request, struct line *line)
4718 {
4719 struct status *status = line->data;
4721 switch (request) {
4722 case REQ_STATUS_UPDATE:
4723 if (!status_update(view))
4724 return REQ_NONE;
4725 break;
4727 case REQ_STATUS_REVERT:
4728 if (!status_revert(status, line->type, status_has_none(view, line)))
4729 return REQ_NONE;
4730 break;
4732 case REQ_STATUS_MERGE:
4733 if (!status || status->status != 'U') {
4734 report("Merging only possible for files with unmerged status ('U').");
4735 return REQ_NONE;
4736 }
4737 open_mergetool(status->new.name);
4738 break;
4740 case REQ_EDIT:
4741 if (!status)
4742 return request;
4743 if (status->status == 'D') {
4744 report("File has been deleted.");
4745 return REQ_NONE;
4746 }
4748 open_editor(status->status != '?', status->new.name);
4749 break;
4751 case REQ_VIEW_BLAME:
4752 if (status) {
4753 string_copy(opt_file, status->new.name);
4754 opt_ref[0] = 0;
4755 }
4756 return request;
4758 case REQ_ENTER:
4759 /* After returning the status view has been split to
4760 * show the stage view. No further reloading is
4761 * necessary. */
4762 status_enter(view, line);
4763 return REQ_NONE;
4765 case REQ_REFRESH:
4766 /* Simply reload the view. */
4767 break;
4769 default:
4770 return request;
4771 }
4773 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
4775 return REQ_NONE;
4776 }
4778 static void
4779 status_select(struct view *view, struct line *line)
4780 {
4781 struct status *status = line->data;
4782 char file[SIZEOF_STR] = "all files";
4783 const char *text;
4784 const char *key;
4786 if (status && !string_format(file, "'%s'", status->new.name))
4787 return;
4789 if (!status && line[1].type == LINE_STAT_NONE)
4790 line++;
4792 switch (line->type) {
4793 case LINE_STAT_STAGED:
4794 text = "Press %s to unstage %s for commit";
4795 break;
4797 case LINE_STAT_UNSTAGED:
4798 text = "Press %s to stage %s for commit";
4799 break;
4801 case LINE_STAT_UNTRACKED:
4802 text = "Press %s to stage %s for addition";
4803 break;
4805 case LINE_STAT_HEAD:
4806 case LINE_STAT_NONE:
4807 text = "Nothing to update";
4808 break;
4810 default:
4811 die("line type %d not handled in switch", line->type);
4812 }
4814 if (status && status->status == 'U') {
4815 text = "Press %s to resolve conflict in %s";
4816 key = get_key(REQ_STATUS_MERGE);
4818 } else {
4819 key = get_key(REQ_STATUS_UPDATE);
4820 }
4822 string_format(view->ref, text, key, file);
4823 }
4825 static bool
4826 status_grep(struct view *view, struct line *line)
4827 {
4828 struct status *status = line->data;
4829 enum { S_STATUS, S_NAME, S_END } state;
4830 char buf[2] = "?";
4831 regmatch_t pmatch;
4833 if (!status)
4834 return FALSE;
4836 for (state = S_STATUS; state < S_END; state++) {
4837 const char *text;
4839 switch (state) {
4840 case S_NAME: text = status->new.name; break;
4841 case S_STATUS:
4842 buf[0] = status->status;
4843 text = buf;
4844 break;
4846 default:
4847 return FALSE;
4848 }
4850 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
4851 return TRUE;
4852 }
4854 return FALSE;
4855 }
4857 static struct view_ops status_ops = {
4858 "file",
4859 NULL,
4860 status_open,
4861 NULL,
4862 status_draw,
4863 status_request,
4864 status_grep,
4865 status_select,
4866 };
4869 static bool
4870 stage_diff_write(struct io *io, struct line *line, struct line *end)
4871 {
4872 while (line < end) {
4873 if (!io_write(io, line->data, strlen(line->data)) ||
4874 !io_write(io, "\n", 1))
4875 return FALSE;
4876 line++;
4877 if (line->type == LINE_DIFF_CHUNK ||
4878 line->type == LINE_DIFF_HEADER)
4879 break;
4880 }
4882 return TRUE;
4883 }
4885 static struct line *
4886 stage_diff_find(struct view *view, struct line *line, enum line_type type)
4887 {
4888 for (; view->line < line; line--)
4889 if (line->type == type)
4890 return line;
4892 return NULL;
4893 }
4895 static bool
4896 stage_apply_chunk(struct view *view, struct line *chunk, bool revert)
4897 {
4898 const char *apply_argv[SIZEOF_ARG] = {
4899 "git", "apply", "--whitespace=nowarn", NULL
4900 };
4901 struct line *diff_hdr;
4902 struct io io = {};
4903 int argc = 3;
4905 diff_hdr = stage_diff_find(view, chunk, LINE_DIFF_HEADER);
4906 if (!diff_hdr)
4907 return FALSE;
4909 if (!revert)
4910 apply_argv[argc++] = "--cached";
4911 if (revert || stage_line_type == LINE_STAT_STAGED)
4912 apply_argv[argc++] = "-R";
4913 apply_argv[argc++] = "-";
4914 apply_argv[argc++] = NULL;
4915 if (!run_io(&io, apply_argv, opt_cdup, IO_WR))
4916 return FALSE;
4918 if (!stage_diff_write(&io, diff_hdr, chunk) ||
4919 !stage_diff_write(&io, chunk, view->line + view->lines))
4920 chunk = NULL;
4922 done_io(&io);
4923 run_io_bg(update_index_argv);
4925 return chunk ? TRUE : FALSE;
4926 }
4928 static bool
4929 stage_update(struct view *view, struct line *line)
4930 {
4931 struct line *chunk = NULL;
4933 if (!is_initial_commit() && stage_line_type != LINE_STAT_UNTRACKED)
4934 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
4936 if (chunk) {
4937 if (!stage_apply_chunk(view, chunk, FALSE)) {
4938 report("Failed to apply chunk");
4939 return FALSE;
4940 }
4942 } else if (!stage_status.status) {
4943 view = VIEW(REQ_VIEW_STATUS);
4945 for (line = view->line; line < view->line + view->lines; line++)
4946 if (line->type == stage_line_type)
4947 break;
4949 if (!status_update_files(view, line + 1)) {
4950 report("Failed to update files");
4951 return FALSE;
4952 }
4954 } else if (!status_update_file(&stage_status, stage_line_type)) {
4955 report("Failed to update file");
4956 return FALSE;
4957 }
4959 return TRUE;
4960 }
4962 static bool
4963 stage_revert(struct view *view, struct line *line)
4964 {
4965 struct line *chunk = NULL;
4967 if (!is_initial_commit() && stage_line_type == LINE_STAT_UNSTAGED)
4968 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
4970 if (chunk) {
4971 if (!prompt_yesno("Are you sure you want to revert changes?"))
4972 return FALSE;
4974 if (!stage_apply_chunk(view, chunk, TRUE)) {
4975 report("Failed to revert chunk");
4976 return FALSE;
4977 }
4978 return TRUE;
4980 } else {
4981 return status_revert(stage_status.status ? &stage_status : NULL,
4982 stage_line_type, FALSE);
4983 }
4984 }
4987 static void
4988 stage_next(struct view *view, struct line *line)
4989 {
4990 int i;
4992 if (!stage_chunks) {
4993 static size_t alloc = 0;
4994 int *tmp;
4996 for (line = view->line; line < view->line + view->lines; line++) {
4997 if (line->type != LINE_DIFF_CHUNK)
4998 continue;
5000 tmp = realloc_items(stage_chunk, &alloc,
5001 stage_chunks, sizeof(*tmp));
5002 if (!tmp) {
5003 report("Allocation failure");
5004 return;
5005 }
5007 stage_chunk = tmp;
5008 stage_chunk[stage_chunks++] = line - view->line;
5009 }
5010 }
5012 for (i = 0; i < stage_chunks; i++) {
5013 if (stage_chunk[i] > view->lineno) {
5014 do_scroll_view(view, stage_chunk[i] - view->lineno);
5015 report("Chunk %d of %d", i + 1, stage_chunks);
5016 return;
5017 }
5018 }
5020 report("No next chunk found");
5021 }
5023 static enum request
5024 stage_request(struct view *view, enum request request, struct line *line)
5025 {
5026 switch (request) {
5027 case REQ_STATUS_UPDATE:
5028 if (!stage_update(view, line))
5029 return REQ_NONE;
5030 break;
5032 case REQ_STATUS_REVERT:
5033 if (!stage_revert(view, line))
5034 return REQ_NONE;
5035 break;
5037 case REQ_STAGE_NEXT:
5038 if (stage_line_type == LINE_STAT_UNTRACKED) {
5039 report("File is untracked; press %s to add",
5040 get_key(REQ_STATUS_UPDATE));
5041 return REQ_NONE;
5042 }
5043 stage_next(view, line);
5044 return REQ_NONE;
5046 case REQ_EDIT:
5047 if (!stage_status.new.name[0])
5048 return request;
5049 if (stage_status.status == 'D') {
5050 report("File has been deleted.");
5051 return REQ_NONE;
5052 }
5054 open_editor(stage_status.status != '?', stage_status.new.name);
5055 break;
5057 case REQ_REFRESH:
5058 /* Reload everything ... */
5059 break;
5061 case REQ_VIEW_BLAME:
5062 if (stage_status.new.name[0]) {
5063 string_copy(opt_file, stage_status.new.name);
5064 opt_ref[0] = 0;
5065 }
5066 return request;
5068 case REQ_ENTER:
5069 return pager_request(view, request, line);
5071 default:
5072 return request;
5073 }
5075 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD | OPEN_NOMAXIMIZE);
5077 /* Check whether the staged entry still exists, and close the
5078 * stage view if it doesn't. */
5079 if (!status_exists(&stage_status, stage_line_type))
5080 return REQ_VIEW_CLOSE;
5082 if (stage_line_type == LINE_STAT_UNTRACKED) {
5083 if (!suffixcmp(stage_status.new.name, -1, "/")) {
5084 report("Cannot display a directory");
5085 return REQ_NONE;
5086 }
5088 if (!prepare_update_file(view, stage_status.new.name)) {
5089 report("Failed to open file: %s", strerror(errno));
5090 return REQ_NONE;
5091 }
5092 }
5093 open_view(view, REQ_VIEW_STAGE, OPEN_REFRESH);
5095 return REQ_NONE;
5096 }
5098 static struct view_ops stage_ops = {
5099 "line",
5100 NULL,
5101 NULL,
5102 pager_read,
5103 pager_draw,
5104 stage_request,
5105 pager_grep,
5106 pager_select,
5107 };
5110 /*
5111 * Revision graph
5112 */
5114 struct commit {
5115 char id[SIZEOF_REV]; /* SHA1 ID. */
5116 char title[128]; /* First line of the commit message. */
5117 char author[75]; /* Author of the commit. */
5118 struct tm time; /* Date from the author ident. */
5119 struct ref **refs; /* Repository references. */
5120 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
5121 size_t graph_size; /* The width of the graph array. */
5122 bool has_parents; /* Rewritten --parents seen. */
5123 };
5125 /* Size of rev graph with no "padding" columns */
5126 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
5128 struct rev_graph {
5129 struct rev_graph *prev, *next, *parents;
5130 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
5131 size_t size;
5132 struct commit *commit;
5133 size_t pos;
5134 unsigned int boundary:1;
5135 };
5137 /* Parents of the commit being visualized. */
5138 static struct rev_graph graph_parents[4];
5140 /* The current stack of revisions on the graph. */
5141 static struct rev_graph graph_stacks[4] = {
5142 { &graph_stacks[3], &graph_stacks[1], &graph_parents[0] },
5143 { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
5144 { &graph_stacks[1], &graph_stacks[3], &graph_parents[2] },
5145 { &graph_stacks[2], &graph_stacks[0], &graph_parents[3] },
5146 };
5148 static inline bool
5149 graph_parent_is_merge(struct rev_graph *graph)
5150 {
5151 return graph->parents->size > 1;
5152 }
5154 static inline void
5155 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
5156 {
5157 struct commit *commit = graph->commit;
5159 if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
5160 commit->graph[commit->graph_size++] = symbol;
5161 }
5163 static void
5164 clear_rev_graph(struct rev_graph *graph)
5165 {
5166 graph->boundary = 0;
5167 graph->size = graph->pos = 0;
5168 graph->commit = NULL;
5169 memset(graph->parents, 0, sizeof(*graph->parents));
5170 }
5172 static void
5173 done_rev_graph(struct rev_graph *graph)
5174 {
5175 if (graph_parent_is_merge(graph) &&
5176 graph->pos < graph->size - 1 &&
5177 graph->next->size == graph->size + graph->parents->size - 1) {
5178 size_t i = graph->pos + graph->parents->size - 1;
5180 graph->commit->graph_size = i * 2;
5181 while (i < graph->next->size - 1) {
5182 append_to_rev_graph(graph, ' ');
5183 append_to_rev_graph(graph, '\\');
5184 i++;
5185 }
5186 }
5188 clear_rev_graph(graph);
5189 }
5191 static void
5192 push_rev_graph(struct rev_graph *graph, const char *parent)
5193 {
5194 int i;
5196 /* "Collapse" duplicate parents lines.
5197 *
5198 * FIXME: This needs to also update update the drawn graph but
5199 * for now it just serves as a method for pruning graph lines. */
5200 for (i = 0; i < graph->size; i++)
5201 if (!strncmp(graph->rev[i], parent, SIZEOF_REV))
5202 return;
5204 if (graph->size < SIZEOF_REVITEMS) {
5205 string_copy_rev(graph->rev[graph->size++], parent);
5206 }
5207 }
5209 static chtype
5210 get_rev_graph_symbol(struct rev_graph *graph)
5211 {
5212 chtype symbol;
5214 if (graph->boundary)
5215 symbol = REVGRAPH_BOUND;
5216 else if (graph->parents->size == 0)
5217 symbol = REVGRAPH_INIT;
5218 else if (graph_parent_is_merge(graph))
5219 symbol = REVGRAPH_MERGE;
5220 else if (graph->pos >= graph->size)
5221 symbol = REVGRAPH_BRANCH;
5222 else
5223 symbol = REVGRAPH_COMMIT;
5225 return symbol;
5226 }
5228 static void
5229 draw_rev_graph(struct rev_graph *graph)
5230 {
5231 struct rev_filler {
5232 chtype separator, line;
5233 };
5234 enum { DEFAULT, RSHARP, RDIAG, LDIAG };
5235 static struct rev_filler fillers[] = {
5236 { ' ', '|' },
5237 { '`', '.' },
5238 { '\'', ' ' },
5239 { '/', ' ' },
5240 };
5241 chtype symbol = get_rev_graph_symbol(graph);
5242 struct rev_filler *filler;
5243 size_t i;
5245 if (opt_line_graphics)
5246 fillers[DEFAULT].line = line_graphics[LINE_GRAPHIC_VLINE];
5248 filler = &fillers[DEFAULT];
5250 for (i = 0; i < graph->pos; i++) {
5251 append_to_rev_graph(graph, filler->line);
5252 if (graph_parent_is_merge(graph->prev) &&
5253 graph->prev->pos == i)
5254 filler = &fillers[RSHARP];
5256 append_to_rev_graph(graph, filler->separator);
5257 }
5259 /* Place the symbol for this revision. */
5260 append_to_rev_graph(graph, symbol);
5262 if (graph->prev->size > graph->size)
5263 filler = &fillers[RDIAG];
5264 else
5265 filler = &fillers[DEFAULT];
5267 i++;
5269 for (; i < graph->size; i++) {
5270 append_to_rev_graph(graph, filler->separator);
5271 append_to_rev_graph(graph, filler->line);
5272 if (graph_parent_is_merge(graph->prev) &&
5273 i < graph->prev->pos + graph->parents->size)
5274 filler = &fillers[RSHARP];
5275 if (graph->prev->size > graph->size)
5276 filler = &fillers[LDIAG];
5277 }
5279 if (graph->prev->size > graph->size) {
5280 append_to_rev_graph(graph, filler->separator);
5281 if (filler->line != ' ')
5282 append_to_rev_graph(graph, filler->line);
5283 }
5284 }
5286 /* Prepare the next rev graph */
5287 static void
5288 prepare_rev_graph(struct rev_graph *graph)
5289 {
5290 size_t i;
5292 /* First, traverse all lines of revisions up to the active one. */
5293 for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
5294 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
5295 break;
5297 push_rev_graph(graph->next, graph->rev[graph->pos]);
5298 }
5300 /* Interleave the new revision parent(s). */
5301 for (i = 0; !graph->boundary && i < graph->parents->size; i++)
5302 push_rev_graph(graph->next, graph->parents->rev[i]);
5304 /* Lastly, put any remaining revisions. */
5305 for (i = graph->pos + 1; i < graph->size; i++)
5306 push_rev_graph(graph->next, graph->rev[i]);
5307 }
5309 static void
5310 update_rev_graph(struct rev_graph *graph)
5311 {
5312 /* If this is the finalizing update ... */
5313 if (graph->commit)
5314 prepare_rev_graph(graph);
5316 /* Graph visualization needs a one rev look-ahead,
5317 * so the first update doesn't visualize anything. */
5318 if (!graph->prev->commit)
5319 return;
5321 draw_rev_graph(graph->prev);
5322 done_rev_graph(graph->prev->prev);
5323 }
5326 /*
5327 * Main view backend
5328 */
5330 static const char *main_argv[SIZEOF_ARG] = {
5331 "git", "log", "--no-color", "--pretty=raw", "--parents",
5332 "--topo-order", "%(head)", NULL
5333 };
5335 static bool
5336 main_draw(struct view *view, struct line *line, unsigned int lineno)
5337 {
5338 struct commit *commit = line->data;
5340 if (!*commit->author)
5341 return FALSE;
5343 if (opt_date && draw_date(view, &commit->time))
5344 return TRUE;
5346 if (opt_author &&
5347 draw_field(view, LINE_MAIN_AUTHOR, commit->author, opt_author_cols, TRUE))
5348 return TRUE;
5350 if (opt_rev_graph && commit->graph_size &&
5351 draw_graphic(view, LINE_MAIN_REVGRAPH, commit->graph, commit->graph_size))
5352 return TRUE;
5354 if (opt_show_refs && commit->refs) {
5355 size_t i = 0;
5357 do {
5358 enum line_type type;
5360 if (commit->refs[i]->head)
5361 type = LINE_MAIN_HEAD;
5362 else if (commit->refs[i]->ltag)
5363 type = LINE_MAIN_LOCAL_TAG;
5364 else if (commit->refs[i]->tag)
5365 type = LINE_MAIN_TAG;
5366 else if (commit->refs[i]->tracked)
5367 type = LINE_MAIN_TRACKED;
5368 else if (commit->refs[i]->remote)
5369 type = LINE_MAIN_REMOTE;
5370 else
5371 type = LINE_MAIN_REF;
5373 if (draw_text(view, type, "[", TRUE) ||
5374 draw_text(view, type, commit->refs[i]->name, TRUE) ||
5375 draw_text(view, type, "]", TRUE))
5376 return TRUE;
5378 if (draw_text(view, LINE_DEFAULT, " ", TRUE))
5379 return TRUE;
5380 } while (commit->refs[i++]->next);
5381 }
5383 draw_text(view, LINE_DEFAULT, commit->title, TRUE);
5384 return TRUE;
5385 }
5387 /* Reads git log --pretty=raw output and parses it into the commit struct. */
5388 static bool
5389 main_read(struct view *view, char *line)
5390 {
5391 static struct rev_graph *graph = graph_stacks;
5392 enum line_type type;
5393 struct commit *commit;
5395 if (!line) {
5396 int i;
5398 if (!view->lines && !view->parent)
5399 die("No revisions match the given arguments.");
5400 if (view->lines > 0) {
5401 commit = view->line[view->lines - 1].data;
5402 if (!*commit->author) {
5403 view->lines--;
5404 free(commit);
5405 graph->commit = NULL;
5406 }
5407 }
5408 update_rev_graph(graph);
5410 for (i = 0; i < ARRAY_SIZE(graph_stacks); i++)
5411 clear_rev_graph(&graph_stacks[i]);
5412 return TRUE;
5413 }
5415 type = get_line_type(line);
5416 if (type == LINE_COMMIT) {
5417 commit = calloc(1, sizeof(struct commit));
5418 if (!commit)
5419 return FALSE;
5421 line += STRING_SIZE("commit ");
5422 if (*line == '-') {
5423 graph->boundary = 1;
5424 line++;
5425 }
5427 string_copy_rev(commit->id, line);
5428 commit->refs = get_refs(commit->id);
5429 graph->commit = commit;
5430 add_line_data(view, commit, LINE_MAIN_COMMIT);
5432 while ((line = strchr(line, ' '))) {
5433 line++;
5434 push_rev_graph(graph->parents, line);
5435 commit->has_parents = TRUE;
5436 }
5437 return TRUE;
5438 }
5440 if (!view->lines)
5441 return TRUE;
5442 commit = view->line[view->lines - 1].data;
5444 switch (type) {
5445 case LINE_PARENT:
5446 if (commit->has_parents)
5447 break;
5448 push_rev_graph(graph->parents, line + STRING_SIZE("parent "));
5449 break;
5451 case LINE_AUTHOR:
5452 {
5453 /* Parse author lines where the name may be empty:
5454 * author <email@address.tld> 1138474660 +0100
5455 */
5456 char *ident = line + STRING_SIZE("author ");
5457 char *nameend = strchr(ident, '<');
5458 char *emailend = strchr(ident, '>');
5460 if (!nameend || !emailend)
5461 break;
5463 update_rev_graph(graph);
5464 graph = graph->next;
5466 *nameend = *emailend = 0;
5467 ident = chomp_string(ident);
5468 if (!*ident) {
5469 ident = chomp_string(nameend + 1);
5470 if (!*ident)
5471 ident = "Unknown";
5472 }
5474 string_ncopy(commit->author, ident, strlen(ident));
5476 /* Parse epoch and timezone */
5477 if (emailend[1] == ' ') {
5478 char *secs = emailend + 2;
5479 char *zone = strchr(secs, ' ');
5480 time_t time = (time_t) atol(secs);
5482 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
5483 long tz;
5485 zone++;
5486 tz = ('0' - zone[1]) * 60 * 60 * 10;
5487 tz += ('0' - zone[2]) * 60 * 60;
5488 tz += ('0' - zone[3]) * 60;
5489 tz += ('0' - zone[4]) * 60;
5491 if (zone[0] == '-')
5492 tz = -tz;
5494 time -= tz;
5495 }
5497 gmtime_r(&time, &commit->time);
5498 }
5499 break;
5500 }
5501 default:
5502 /* Fill in the commit title if it has not already been set. */
5503 if (commit->title[0])
5504 break;
5506 /* Require titles to start with a non-space character at the
5507 * offset used by git log. */
5508 if (strncmp(line, " ", 4))
5509 break;
5510 line += 4;
5511 /* Well, if the title starts with a whitespace character,
5512 * try to be forgiving. Otherwise we end up with no title. */
5513 while (isspace(*line))
5514 line++;
5515 if (*line == '\0')
5516 break;
5517 /* FIXME: More graceful handling of titles; append "..." to
5518 * shortened titles, etc. */
5520 string_ncopy(commit->title, line, strlen(line));
5521 }
5523 return TRUE;
5524 }
5526 static enum request
5527 main_request(struct view *view, enum request request, struct line *line)
5528 {
5529 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
5531 switch (request) {
5532 case REQ_ENTER:
5533 open_view(view, REQ_VIEW_DIFF, flags);
5534 break;
5535 case REQ_REFRESH:
5536 load_refs();
5537 open_view(view, REQ_VIEW_MAIN, OPEN_REFRESH);
5538 break;
5539 default:
5540 return request;
5541 }
5543 return REQ_NONE;
5544 }
5546 static bool
5547 grep_refs(struct ref **refs, regex_t *regex)
5548 {
5549 regmatch_t pmatch;
5550 size_t i = 0;
5552 if (!refs)
5553 return FALSE;
5554 do {
5555 if (regexec(regex, refs[i]->name, 1, &pmatch, 0) != REG_NOMATCH)
5556 return TRUE;
5557 } while (refs[i++]->next);
5559 return FALSE;
5560 }
5562 static bool
5563 main_grep(struct view *view, struct line *line)
5564 {
5565 struct commit *commit = line->data;
5566 enum { S_TITLE, S_AUTHOR, S_DATE, S_REFS, S_END } state;
5567 char buf[DATE_COLS + 1];
5568 regmatch_t pmatch;
5570 for (state = S_TITLE; state < S_END; state++) {
5571 char *text;
5573 switch (state) {
5574 case S_TITLE: text = commit->title; break;
5575 case S_AUTHOR:
5576 if (!opt_author)
5577 continue;
5578 text = commit->author;
5579 break;
5580 case S_DATE:
5581 if (!opt_date)
5582 continue;
5583 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
5584 continue;
5585 text = buf;
5586 break;
5587 case S_REFS:
5588 if (!opt_show_refs)
5589 continue;
5590 if (grep_refs(commit->refs, view->regex) == TRUE)
5591 return TRUE;
5592 continue;
5593 default:
5594 return FALSE;
5595 }
5597 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
5598 return TRUE;
5599 }
5601 return FALSE;
5602 }
5604 static void
5605 main_select(struct view *view, struct line *line)
5606 {
5607 struct commit *commit = line->data;
5609 string_copy_rev(view->ref, commit->id);
5610 string_copy_rev(ref_commit, view->ref);
5611 }
5613 static struct view_ops main_ops = {
5614 "commit",
5615 main_argv,
5616 NULL,
5617 main_read,
5618 main_draw,
5619 main_request,
5620 main_grep,
5621 main_select,
5622 };
5625 /*
5626 * Unicode / UTF-8 handling
5627 *
5628 * NOTE: Much of the following code for dealing with unicode is derived from
5629 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
5630 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
5631 */
5633 /* I've (over)annotated a lot of code snippets because I am not entirely
5634 * confident that the approach taken by this small UTF-8 interface is correct.
5635 * --jonas */
5637 static inline int
5638 unicode_width(unsigned long c)
5639 {
5640 if (c >= 0x1100 &&
5641 (c <= 0x115f /* Hangul Jamo */
5642 || c == 0x2329
5643 || c == 0x232a
5644 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
5645 /* CJK ... Yi */
5646 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
5647 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
5648 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
5649 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
5650 || (c >= 0xffe0 && c <= 0xffe6)
5651 || (c >= 0x20000 && c <= 0x2fffd)
5652 || (c >= 0x30000 && c <= 0x3fffd)))
5653 return 2;
5655 if (c == '\t')
5656 return opt_tab_size;
5658 return 1;
5659 }
5661 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
5662 * Illegal bytes are set one. */
5663 static const unsigned char utf8_bytes[256] = {
5664 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
5665 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
5666 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
5667 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
5668 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
5669 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
5670 2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,
5671 3,3,3,3,3,3,3,3, 3,3,3,3,3,3,3,3, 4,4,4,4,4,4,4,4, 5,5,5,5,6,6,1,1,
5672 };
5674 /* Decode UTF-8 multi-byte representation into a unicode character. */
5675 static inline unsigned long
5676 utf8_to_unicode(const char *string, size_t length)
5677 {
5678 unsigned long unicode;
5680 switch (length) {
5681 case 1:
5682 unicode = string[0];
5683 break;
5684 case 2:
5685 unicode = (string[0] & 0x1f) << 6;
5686 unicode += (string[1] & 0x3f);
5687 break;
5688 case 3:
5689 unicode = (string[0] & 0x0f) << 12;
5690 unicode += ((string[1] & 0x3f) << 6);
5691 unicode += (string[2] & 0x3f);
5692 break;
5693 case 4:
5694 unicode = (string[0] & 0x0f) << 18;
5695 unicode += ((string[1] & 0x3f) << 12);
5696 unicode += ((string[2] & 0x3f) << 6);
5697 unicode += (string[3] & 0x3f);
5698 break;
5699 case 5:
5700 unicode = (string[0] & 0x0f) << 24;
5701 unicode += ((string[1] & 0x3f) << 18);
5702 unicode += ((string[2] & 0x3f) << 12);
5703 unicode += ((string[3] & 0x3f) << 6);
5704 unicode += (string[4] & 0x3f);
5705 break;
5706 case 6:
5707 unicode = (string[0] & 0x01) << 30;
5708 unicode += ((string[1] & 0x3f) << 24);
5709 unicode += ((string[2] & 0x3f) << 18);
5710 unicode += ((string[3] & 0x3f) << 12);
5711 unicode += ((string[4] & 0x3f) << 6);
5712 unicode += (string[5] & 0x3f);
5713 break;
5714 default:
5715 die("Invalid unicode length");
5716 }
5718 /* Invalid characters could return the special 0xfffd value but NUL
5719 * should be just as good. */
5720 return unicode > 0xffff ? 0 : unicode;
5721 }
5723 /* Calculates how much of string can be shown within the given maximum width
5724 * and sets trimmed parameter to non-zero value if all of string could not be
5725 * shown. If the reserve flag is TRUE, it will reserve at least one
5726 * trailing character, which can be useful when drawing a delimiter.
5727 *
5728 * Returns the number of bytes to output from string to satisfy max_width. */
5729 static size_t
5730 utf8_length(const char *string, int *width, size_t max_width, int *trimmed, bool reserve)
5731 {
5732 const char *start = string;
5733 const char *end = strchr(string, '\0');
5734 unsigned char last_bytes = 0;
5735 size_t last_ucwidth = 0;
5737 *width = 0;
5738 *trimmed = 0;
5740 while (string < end) {
5741 int c = *(unsigned char *) string;
5742 unsigned char bytes = utf8_bytes[c];
5743 size_t ucwidth;
5744 unsigned long unicode;
5746 if (string + bytes > end)
5747 break;
5749 /* Change representation to figure out whether
5750 * it is a single- or double-width character. */
5752 unicode = utf8_to_unicode(string, bytes);
5753 /* FIXME: Graceful handling of invalid unicode character. */
5754 if (!unicode)
5755 break;
5757 ucwidth = unicode_width(unicode);
5758 *width += ucwidth;
5759 if (*width > max_width) {
5760 *trimmed = 1;
5761 *width -= ucwidth;
5762 if (reserve && *width == max_width) {
5763 string -= last_bytes;
5764 *width -= last_ucwidth;
5765 }
5766 break;
5767 }
5769 string += bytes;
5770 last_bytes = bytes;
5771 last_ucwidth = ucwidth;
5772 }
5774 return string - start;
5775 }
5778 /*
5779 * Status management
5780 */
5782 /* Whether or not the curses interface has been initialized. */
5783 static bool cursed = FALSE;
5785 /* The status window is used for polling keystrokes. */
5786 static WINDOW *status_win;
5788 static bool status_empty = TRUE;
5790 /* Update status and title window. */
5791 static void
5792 report(const char *msg, ...)
5793 {
5794 struct view *view = display[current_view];
5796 if (input_mode)
5797 return;
5799 if (!view) {
5800 char buf[SIZEOF_STR];
5801 va_list args;
5803 va_start(args, msg);
5804 if (vsnprintf(buf, sizeof(buf), msg, args) >= sizeof(buf)) {
5805 buf[sizeof(buf) - 1] = 0;
5806 buf[sizeof(buf) - 2] = '.';
5807 buf[sizeof(buf) - 3] = '.';
5808 buf[sizeof(buf) - 4] = '.';
5809 }
5810 va_end(args);
5811 die("%s", buf);
5812 }
5814 if (!status_empty || *msg) {
5815 va_list args;
5817 va_start(args, msg);
5819 wmove(status_win, 0, 0);
5820 if (*msg) {
5821 vwprintw(status_win, msg, args);
5822 status_empty = FALSE;
5823 } else {
5824 status_empty = TRUE;
5825 }
5826 wclrtoeol(status_win);
5827 wrefresh(status_win);
5829 va_end(args);
5830 }
5832 update_view_title(view);
5833 update_display_cursor(view);
5834 }
5836 /* Controls when nodelay should be in effect when polling user input. */
5837 static void
5838 set_nonblocking_input(bool loading)
5839 {
5840 static unsigned int loading_views;
5842 if ((loading == FALSE && loading_views-- == 1) ||
5843 (loading == TRUE && loading_views++ == 0))
5844 nodelay(status_win, loading);
5845 }
5847 static void
5848 init_display(void)
5849 {
5850 int x, y;
5852 /* Initialize the curses library */
5853 if (isatty(STDIN_FILENO)) {
5854 cursed = !!initscr();
5855 opt_tty = stdin;
5856 } else {
5857 /* Leave stdin and stdout alone when acting as a pager. */
5858 opt_tty = fopen("/dev/tty", "r+");
5859 if (!opt_tty)
5860 die("Failed to open /dev/tty");
5861 cursed = !!newterm(NULL, opt_tty, opt_tty);
5862 }
5864 if (!cursed)
5865 die("Failed to initialize curses");
5867 nonl(); /* Tell curses not to do NL->CR/NL on output */
5868 cbreak(); /* Take input chars one at a time, no wait for \n */
5869 noecho(); /* Don't echo input */
5870 leaveok(stdscr, TRUE);
5872 if (has_colors())
5873 init_colors();
5875 getmaxyx(stdscr, y, x);
5876 status_win = newwin(1, 0, y - 1, 0);
5877 if (!status_win)
5878 die("Failed to create status window");
5880 /* Enable keyboard mapping */
5881 keypad(status_win, TRUE);
5882 wbkgdset(status_win, get_line_attr(LINE_STATUS));
5884 TABSIZE = opt_tab_size;
5885 if (opt_line_graphics) {
5886 line_graphics[LINE_GRAPHIC_VLINE] = ACS_VLINE;
5887 }
5888 }
5890 static bool
5891 prompt_yesno(const char *prompt)
5892 {
5893 enum { WAIT, STOP, CANCEL } status = WAIT;
5894 bool answer = FALSE;
5896 while (status == WAIT) {
5897 struct view *view;
5898 int i, key;
5900 input_mode = TRUE;
5902 foreach_view (view, i)
5903 update_view(view);
5905 input_mode = FALSE;
5907 mvwprintw(status_win, 0, 0, "%s [Yy]/[Nn]", prompt);
5908 wclrtoeol(status_win);
5910 /* Refresh, accept single keystroke of input */
5911 key = wgetch(status_win);
5912 switch (key) {
5913 case ERR:
5914 break;
5916 case 'y':
5917 case 'Y':
5918 answer = TRUE;
5919 status = STOP;
5920 break;
5922 case KEY_ESC:
5923 case KEY_RETURN:
5924 case KEY_ENTER:
5925 case KEY_BACKSPACE:
5926 case 'n':
5927 case 'N':
5928 case '\n':
5929 default:
5930 answer = FALSE;
5931 status = CANCEL;
5932 }
5933 }
5935 /* Clear the status window */
5936 status_empty = FALSE;
5937 report("");
5939 return answer;
5940 }
5942 static char *
5943 read_prompt(const char *prompt)
5944 {
5945 enum { READING, STOP, CANCEL } status = READING;
5946 static char buf[SIZEOF_STR];
5947 int pos = 0;
5949 while (status == READING) {
5950 struct view *view;
5951 int i, key;
5953 input_mode = TRUE;
5955 foreach_view (view, i)
5956 update_view(view);
5958 input_mode = FALSE;
5960 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
5961 wclrtoeol(status_win);
5963 /* Refresh, accept single keystroke of input */
5964 key = wgetch(status_win);
5965 switch (key) {
5966 case KEY_RETURN:
5967 case KEY_ENTER:
5968 case '\n':
5969 status = pos ? STOP : CANCEL;
5970 break;
5972 case KEY_BACKSPACE:
5973 if (pos > 0)
5974 pos--;
5975 else
5976 status = CANCEL;
5977 break;
5979 case KEY_ESC:
5980 status = CANCEL;
5981 break;
5983 case ERR:
5984 break;
5986 default:
5987 if (pos >= sizeof(buf)) {
5988 report("Input string too long");
5989 return NULL;
5990 }
5992 if (isprint(key))
5993 buf[pos++] = (char) key;
5994 }
5995 }
5997 /* Clear the status window */
5998 status_empty = FALSE;
5999 report("");
6001 if (status == CANCEL)
6002 return NULL;
6004 buf[pos++] = 0;
6006 return buf;
6007 }
6009 /*
6010 * Repository properties
6011 */
6013 static int
6014 git_properties(const char **argv, const char *separators,
6015 int (*read_property)(char *, size_t, char *, size_t))
6016 {
6017 struct io io = {};
6019 if (init_io_rd(&io, argv, NULL, FORMAT_NONE))
6020 return read_properties(&io, separators, read_property);
6021 return ERR;
6022 }
6024 static struct ref *refs = NULL;
6025 static size_t refs_alloc = 0;
6026 static size_t refs_size = 0;
6028 /* Id <-> ref store */
6029 static struct ref ***id_refs = NULL;
6030 static size_t id_refs_alloc = 0;
6031 static size_t id_refs_size = 0;
6033 static int
6034 compare_refs(const void *ref1_, const void *ref2_)
6035 {
6036 const struct ref *ref1 = *(const struct ref **)ref1_;
6037 const struct ref *ref2 = *(const struct ref **)ref2_;
6039 if (ref1->tag != ref2->tag)
6040 return ref2->tag - ref1->tag;
6041 if (ref1->ltag != ref2->ltag)
6042 return ref2->ltag - ref2->ltag;
6043 if (ref1->head != ref2->head)
6044 return ref2->head - ref1->head;
6045 if (ref1->tracked != ref2->tracked)
6046 return ref2->tracked - ref1->tracked;
6047 if (ref1->remote != ref2->remote)
6048 return ref2->remote - ref1->remote;
6049 return strcmp(ref1->name, ref2->name);
6050 }
6052 static struct ref **
6053 get_refs(const char *id)
6054 {
6055 struct ref ***tmp_id_refs;
6056 struct ref **ref_list = NULL;
6057 size_t ref_list_alloc = 0;
6058 size_t ref_list_size = 0;
6059 size_t i;
6061 for (i = 0; i < id_refs_size; i++)
6062 if (!strcmp(id, id_refs[i][0]->id))
6063 return id_refs[i];
6065 tmp_id_refs = realloc_items(id_refs, &id_refs_alloc, id_refs_size + 1,
6066 sizeof(*id_refs));
6067 if (!tmp_id_refs)
6068 return NULL;
6070 id_refs = tmp_id_refs;
6072 for (i = 0; i < refs_size; i++) {
6073 struct ref **tmp;
6075 if (strcmp(id, refs[i].id))
6076 continue;
6078 tmp = realloc_items(ref_list, &ref_list_alloc,
6079 ref_list_size + 1, sizeof(*ref_list));
6080 if (!tmp) {
6081 if (ref_list)
6082 free(ref_list);
6083 return NULL;
6084 }
6086 ref_list = tmp;
6087 ref_list[ref_list_size] = &refs[i];
6088 /* XXX: The properties of the commit chains ensures that we can
6089 * safely modify the shared ref. The repo references will
6090 * always be similar for the same id. */
6091 ref_list[ref_list_size]->next = 1;
6093 ref_list_size++;
6094 }
6096 if (ref_list) {
6097 qsort(ref_list, ref_list_size, sizeof(*ref_list), compare_refs);
6098 ref_list[ref_list_size - 1]->next = 0;
6099 id_refs[id_refs_size++] = ref_list;
6100 }
6102 return ref_list;
6103 }
6105 static int
6106 read_ref(char *id, size_t idlen, char *name, size_t namelen)
6107 {
6108 struct ref *ref;
6109 bool tag = FALSE;
6110 bool ltag = FALSE;
6111 bool remote = FALSE;
6112 bool tracked = FALSE;
6113 bool check_replace = FALSE;
6114 bool head = FALSE;
6116 if (!prefixcmp(name, "refs/tags/")) {
6117 if (!suffixcmp(name, namelen, "^{}")) {
6118 namelen -= 3;
6119 name[namelen] = 0;
6120 if (refs_size > 0 && refs[refs_size - 1].ltag == TRUE)
6121 check_replace = TRUE;
6122 } else {
6123 ltag = TRUE;
6124 }
6126 tag = TRUE;
6127 namelen -= STRING_SIZE("refs/tags/");
6128 name += STRING_SIZE("refs/tags/");
6130 } else if (!prefixcmp(name, "refs/remotes/")) {
6131 remote = TRUE;
6132 namelen -= STRING_SIZE("refs/remotes/");
6133 name += STRING_SIZE("refs/remotes/");
6134 tracked = !strcmp(opt_remote, name);
6136 } else if (!prefixcmp(name, "refs/heads/")) {
6137 namelen -= STRING_SIZE("refs/heads/");
6138 name += STRING_SIZE("refs/heads/");
6139 head = !strncmp(opt_head, name, namelen);
6141 } else if (!strcmp(name, "HEAD")) {
6142 string_ncopy(opt_head_rev, id, idlen);
6143 return OK;
6144 }
6146 if (check_replace && !strcmp(name, refs[refs_size - 1].name)) {
6147 /* it's an annotated tag, replace the previous sha1 with the
6148 * resolved commit id; relies on the fact git-ls-remote lists
6149 * the commit id of an annotated tag right before the commit id
6150 * it points to. */
6151 refs[refs_size - 1].ltag = ltag;
6152 string_copy_rev(refs[refs_size - 1].id, id);
6154 return OK;
6155 }
6156 refs = realloc_items(refs, &refs_alloc, refs_size + 1, sizeof(*refs));
6157 if (!refs)
6158 return ERR;
6160 ref = &refs[refs_size++];
6161 ref->name = malloc(namelen + 1);
6162 if (!ref->name)
6163 return ERR;
6165 strncpy(ref->name, name, namelen);
6166 ref->name[namelen] = 0;
6167 ref->head = head;
6168 ref->tag = tag;
6169 ref->ltag = ltag;
6170 ref->remote = remote;
6171 ref->tracked = tracked;
6172 string_copy_rev(ref->id, id);
6174 return OK;
6175 }
6177 static int
6178 load_refs(void)
6179 {
6180 static const char *ls_remote_argv[SIZEOF_ARG] = {
6181 "git", "ls-remote", ".", NULL
6182 };
6183 static bool init = FALSE;
6185 if (!init) {
6186 argv_from_env(ls_remote_argv, "TIG_LS_REMOTE");
6187 init = TRUE;
6188 }
6190 if (!*opt_git_dir)
6191 return OK;
6193 while (refs_size > 0)
6194 free(refs[--refs_size].name);
6195 while (id_refs_size > 0)
6196 free(id_refs[--id_refs_size]);
6198 return git_properties(ls_remote_argv, "\t", read_ref);
6199 }
6201 static int
6202 read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen)
6203 {
6204 if (!strcmp(name, "i18n.commitencoding"))
6205 string_ncopy(opt_encoding, value, valuelen);
6207 if (!strcmp(name, "core.editor"))
6208 string_ncopy(opt_editor, value, valuelen);
6210 /* branch.<head>.remote */
6211 if (*opt_head &&
6212 !strncmp(name, "branch.", 7) &&
6213 !strncmp(name + 7, opt_head, strlen(opt_head)) &&
6214 !strcmp(name + 7 + strlen(opt_head), ".remote"))
6215 string_ncopy(opt_remote, value, valuelen);
6217 if (*opt_head && *opt_remote &&
6218 !strncmp(name, "branch.", 7) &&
6219 !strncmp(name + 7, opt_head, strlen(opt_head)) &&
6220 !strcmp(name + 7 + strlen(opt_head), ".merge")) {
6221 size_t from = strlen(opt_remote);
6223 if (!prefixcmp(value, "refs/heads/")) {
6224 value += STRING_SIZE("refs/heads/");
6225 valuelen -= STRING_SIZE("refs/heads/");
6226 }
6228 if (!string_format_from(opt_remote, &from, "/%s", value))
6229 opt_remote[0] = 0;
6230 }
6232 return OK;
6233 }
6235 static int
6236 load_git_config(void)
6237 {
6238 const char *config_list_argv[] = { "git", GIT_CONFIG, "--list", NULL };
6240 return git_properties(config_list_argv, "=", read_repo_config_option);
6241 }
6243 static int
6244 read_repo_info(char *name, size_t namelen, char *value, size_t valuelen)
6245 {
6246 if (!opt_git_dir[0]) {
6247 string_ncopy(opt_git_dir, name, namelen);
6249 } else if (opt_is_inside_work_tree == -1) {
6250 /* This can be 3 different values depending on the
6251 * version of git being used. If git-rev-parse does not
6252 * understand --is-inside-work-tree it will simply echo
6253 * the option else either "true" or "false" is printed.
6254 * Default to true for the unknown case. */
6255 opt_is_inside_work_tree = strcmp(name, "false") ? TRUE : FALSE;
6256 } else {
6257 string_ncopy(opt_cdup, name, namelen);
6258 }
6260 return OK;
6261 }
6263 static int
6264 load_repo_info(void)
6265 {
6266 const char *head_argv[] = {
6267 "git", "symbolic-ref", "HEAD", NULL
6268 };
6269 const char *rev_parse_argv[] = {
6270 "git", "rev-parse", "--git-dir", "--is-inside-work-tree",
6271 "--show-cdup", NULL
6272 };
6274 if (run_io_buf(head_argv, opt_head, sizeof(opt_head))) {
6275 chomp_string(opt_head);
6276 if (!prefixcmp(opt_head, "refs/heads/")) {
6277 char *offset = opt_head + STRING_SIZE("refs/heads/");
6279 memmove(opt_head, offset, strlen(offset) + 1);
6280 }
6281 }
6283 return git_properties(rev_parse_argv, "=", read_repo_info);
6284 }
6286 static int
6287 read_properties(struct io *io, const char *separators,
6288 int (*read_property)(char *, size_t, char *, size_t))
6289 {
6290 char *name;
6291 int state = OK;
6293 if (!start_io(io))
6294 return ERR;
6296 while (state == OK && (name = io_get(io, '\n', TRUE))) {
6297 char *value;
6298 size_t namelen;
6299 size_t valuelen;
6301 name = chomp_string(name);
6302 namelen = strcspn(name, separators);
6304 if (name[namelen]) {
6305 name[namelen] = 0;
6306 value = chomp_string(name + namelen + 1);
6307 valuelen = strlen(value);
6309 } else {
6310 value = "";
6311 valuelen = 0;
6312 }
6314 state = read_property(name, namelen, value, valuelen);
6315 }
6317 if (state != ERR && io_error(io))
6318 state = ERR;
6319 done_io(io);
6321 return state;
6322 }
6325 /*
6326 * Main
6327 */
6329 static void __NORETURN
6330 quit(int sig)
6331 {
6332 /* XXX: Restore tty modes and let the OS cleanup the rest! */
6333 if (cursed)
6334 endwin();
6335 exit(0);
6336 }
6338 static void __NORETURN
6339 die(const char *err, ...)
6340 {
6341 va_list args;
6343 endwin();
6345 va_start(args, err);
6346 fputs("tig: ", stderr);
6347 vfprintf(stderr, err, args);
6348 fputs("\n", stderr);
6349 va_end(args);
6351 exit(1);
6352 }
6354 static void
6355 warn(const char *msg, ...)
6356 {
6357 va_list args;
6359 va_start(args, msg);
6360 fputs("tig warning: ", stderr);
6361 vfprintf(stderr, msg, args);
6362 fputs("\n", stderr);
6363 va_end(args);
6364 }
6366 int
6367 main(int argc, const char *argv[])
6368 {
6369 const char **run_argv = NULL;
6370 struct view *view;
6371 enum request request;
6372 size_t i;
6374 signal(SIGINT, quit);
6376 if (setlocale(LC_ALL, "")) {
6377 char *codeset = nl_langinfo(CODESET);
6379 string_ncopy(opt_codeset, codeset, strlen(codeset));
6380 }
6382 if (load_repo_info() == ERR)
6383 die("Failed to load repo info.");
6385 if (load_options() == ERR)
6386 die("Failed to load user config.");
6388 if (load_git_config() == ERR)
6389 die("Failed to load repo config.");
6391 request = parse_options(argc, argv, &run_argv);
6392 if (request == REQ_NONE)
6393 return 0;
6395 /* Require a git repository unless when running in pager mode. */
6396 if (!opt_git_dir[0] && request != REQ_VIEW_PAGER)
6397 die("Not a git repository");
6399 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
6400 opt_utf8 = FALSE;
6402 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
6403 opt_iconv = iconv_open(opt_codeset, opt_encoding);
6404 if (opt_iconv == ICONV_NONE)
6405 die("Failed to initialize character set conversion");
6406 }
6408 if (load_refs() == ERR)
6409 die("Failed to load refs.");
6411 foreach_view (view, i)
6412 argv_from_env(view->ops->argv, view->cmd_env);
6414 init_display();
6416 if (request == REQ_VIEW_PAGER || run_argv) {
6417 if (request == REQ_VIEW_PAGER)
6418 io_open(&VIEW(request)->io, "");
6419 else if (!prepare_update(VIEW(request), run_argv, NULL, FORMAT_NONE))
6420 die("Failed to format arguments");
6421 open_view(NULL, request, OPEN_PREPARED);
6422 request = REQ_NONE;
6423 }
6425 while (view_driver(display[current_view], request)) {
6426 int key;
6427 int i;
6429 foreach_view (view, i)
6430 update_view(view);
6431 view = display[current_view];
6433 /* Refresh, accept single keystroke of input */
6434 key = wgetch(status_win);
6436 /* wgetch() with nodelay() enabled returns ERR when there's no
6437 * input. */
6438 if (key == ERR) {
6439 request = REQ_NONE;
6440 continue;
6441 }
6443 request = get_keybinding(view->keymap, key);
6445 /* Some low-level request handling. This keeps access to
6446 * status_win restricted. */
6447 switch (request) {
6448 case REQ_PROMPT:
6449 {
6450 char *cmd = read_prompt(":");
6452 if (cmd) {
6453 struct view *next = VIEW(REQ_VIEW_PAGER);
6454 const char *argv[SIZEOF_ARG] = { "git" };
6455 int argc = 1;
6457 /* When running random commands, initially show the
6458 * command in the title. However, it maybe later be
6459 * overwritten if a commit line is selected. */
6460 string_ncopy(next->ref, cmd, strlen(cmd));
6462 if (!argv_from_string(argv, &argc, cmd)) {
6463 report("Too many arguments");
6464 } else if (!prepare_update(next, argv, NULL, FORMAT_DASH)) {
6465 report("Failed to format command");
6466 } else {
6467 open_view(view, REQ_VIEW_PAGER, OPEN_PREPARED);
6468 }
6469 }
6471 request = REQ_NONE;
6472 break;
6473 }
6474 case REQ_SEARCH:
6475 case REQ_SEARCH_BACK:
6476 {
6477 const char *prompt = request == REQ_SEARCH ? "/" : "?";
6478 char *search = read_prompt(prompt);
6480 if (search)
6481 string_ncopy(opt_search, search, strlen(search));
6482 else
6483 request = REQ_NONE;
6484 break;
6485 }
6486 case REQ_SCREEN_RESIZE:
6487 {
6488 int height, width;
6490 getmaxyx(stdscr, height, width);
6492 /* Resize the status view and let the view driver take
6493 * care of resizing the displayed views. */
6494 wresize(status_win, 1, width);
6495 mvwin(status_win, height - 1, 0);
6496 wrefresh(status_win);
6497 break;
6498 }
6499 default:
6500 break;
6501 }
6502 }
6504 quit(0);
6506 return 0;
6507 }